diff --git a/public/js/wingbase/world/physics.js b/public/js/wingbase/world/physics.js
index 43dfde0..42a3fce 100644
--- a/public/js/wingbase/world/physics.js
+++ b/public/js/wingbase/world/physics.js
@@ -1,3 +1,5 @@
+// TODO: Find more up-to-date Box2D library with Box2D 2.3 or higher.
+
 class Physics {
 	constructor() {
 
diff --git a/server/game/net/connection.js b/server/game/net/connection.js
index a702726..a1ac300 100644
--- a/server/game/net/connection.js
+++ b/server/game/net/connection.js
@@ -26,6 +26,10 @@ class Connection {
 			this.player.updateInputs(data);
 		});
 
+		socket.on('test', data => {
+			this.player.room.world.test();
+		});
+
 		this.server.assignRoom(this.player);
 	}
 
diff --git a/server/game/room/world/body/body.js b/server/game/room/world/body/body.js
index 42f4ae3..8a6d5ec 100644
--- a/server/game/room/world/body/body.js
+++ b/server/game/room/world/body/body.js
@@ -70,6 +70,13 @@ class Body {
 	packFull() {
 	}
 
+	get com() {
+		return {
+			x: this.b2body.GetLocalCenter().x,
+			y: this.b2body.GetLocalCenter().y
+		}
+	}
+
 	get center() {
 		return {
 			x: this.b2body.GetWorldCenter().x,
diff --git a/server/game/room/world/copula/copula.js b/server/game/room/world/copula/copula.js
index e9751bc..a69b642 100644
--- a/server/game/room/world/copula/copula.js
+++ b/server/game/room/world/copula/copula.js
@@ -1,9 +1,11 @@
 'use strict';
 
 class Copula {
-	constructor(b1, b2) {
-		this.b1 = b1;
-		this.b2 = b2;
+	constructor(b1, b2, p1, p2) {
+		this.bodyA = b1;
+		this.bodyB = b2;
+		this.pointA = p1 || b1.com;
+		this.pointB = p2 || b2.com;
 	}
 }
 
diff --git a/server/game/room/world/copula/rope.js b/server/game/room/world/copula/rope.js
index 0ebd0c4..82804e4 100644
--- a/server/game/room/world/copula/rope.js
+++ b/server/game/room/world/copula/rope.js
@@ -3,8 +3,19 @@
 const Copula = require('./copula.js');
 
 class Rope extends Copula {
-	constructor(p1, p2) {
-		super();
+	constructor(b1, b2) {
+		super(b1, b2);
+		this.type = 'rope';
+		this._length = 0;
+	}
+
+	get length() {
+		return this._length;
+	}
+
+	set length(len) {
+		this.length = len;
+		this.b2joint.SetLength(len);
 	}
 }
 
diff --git a/server/game/room/world/index.js b/server/game/room/world/index.js
index c276b20..d4c25af 100644
--- a/server/game/room/world/index.js
+++ b/server/game/room/world/index.js
@@ -41,6 +41,20 @@ class World {
 		let ship = new Ship(this, pos, player);
 		player.ship = ship;
 		this.addShip(ship);
+
+		//this.test();
+	}
+
+	test() {
+		if (this.players.size == 2) {
+			let b1 = Array.from(this.players)[0].ship;
+			let b2 = Array.from(this.players)[1].ship;
+
+			let copula = new (require('./copula/rope.js'))(b1, b2);
+			if (b1 != b2) {
+				this.physics.createCopula(copula);
+			}
+		}
 	}
 
 	addShip(ship) {
@@ -100,14 +114,6 @@ class World {
 			};
 			this.spawner.spawnAsteroid(pos.x, pos.y,Math.random() * 50 + 10);
 		}
-
-		let a1 = Array.from(this.asteroids)[Math.random() * this.asteroids.size];
-		let a2 = Array.from(this.asteroids)[Math.random() * this.asteroids.size];
-
-		let copula = new (require('./copula/copula.js'))(a1, a2);
-		if (a1 != a2) {
-			this.physics.createCopula(copula);
-		}
 	}
 
 	removePlayer(player) {
diff --git a/server/game/room/world/physics.js b/server/game/room/world/physics.js
index 8ad0466..c5c5aad 100644
--- a/server/game/room/world/physics.js
+++ b/server/game/room/world/physics.js
@@ -4,6 +4,12 @@
 // so most changes done to it should be mirrored there to keep consistent
 // physics between client and server.
 
+// Note:
+// b2Body.GetWorldPoint is broken or something and to get it to work, you
+// must pass an object as the second argument. I don't think it matters what
+// object but numbers and strings don't work, so do something like
+// b2body.GetWorldPoint(new b2Vec2(x, y), {});
+
 const SCALE = 32;
 
 const Box2D = require('box2d-html5');
@@ -19,11 +25,15 @@ class Physics {
 			let bodya = contact.GetFixtureA().GetBody().GetUserData();
 			let bodyb = contact.GetFixtureB().GetBody().GetUserData();
 
-			bodya.applyDelta();
-			bodyb.applyDelta();
+			if (bodya) {
+				bodya.applyDelta();
+				bodya.contact(bodyb);
+			}
 
-			bodya.contact(bodyb);
-			bodyb.contact(bodya);
+			if (bodyb) {
+				bodyb.applyDelta();
+				bodyb.contact(bodya);
+			}
 		}
 
 		let listener = new Box2D.b2ContactListener();
@@ -66,11 +76,37 @@ class Physics {
 		}
 
 		body.b2body = b2body;
+
 		//if (body.type == 'ship') console.log(b2body.GetLocalCenter());
 	}
 
+	// TODO: Make this shorter somehow.
 	createCopula(copula) {
-		
+		if (copula.type == 'rope') {
+			let b1 = copula.bodyA.b2body;
+			let b2 = copula.bodyB.b2body;
+			let p1 = copula.pointA;
+			let p2 = copula.pointB;
+			// See top of file.
+			let start = b1.GetWorldPoint(b1.GetLocalCenter(), {});
+			let end = b2.GetWorldPoint(new b2Vec2(p2.x, p2.y), {});
+			console.log(start, end);
+			let dx = start.x - end.x
+			let dy = start.y - end.y;
+			let len = Math.sqrt(dx * dx + dy * dy);
+
+			let ropeDef = new Box2D.b2RopeJointDef();
+			ropeDef.bodyA = b1;
+			ropeDef.bodyB = b2;
+			ropeDef.maxLength = len;
+			ropeDef.collideConnected = true;
+			ropeDef.worldAnchorA = new b2Vec2(start);
+			ropeDef.worldAnchorB = new b2Vec2(end);
+			let b2joint = this.world.CreateJoint(ropeDef);
+
+			copula.b2joint = b2joint;
+		}
+
 	}
 
 	raycast(start, end) {
@@ -84,7 +120,7 @@ class Physics {
 		};
 		let i = 0;
 		this.world.RayCast((fixture, point, normal, fraction) => {
-			let body = fixture.GetBody().GetUserData();;
+			let body = fixture.GetBody().GetUserData();
 			if (fraction <= closest.fraction) {
 				closest = {
 					body: body,
@@ -102,6 +138,10 @@ class Physics {
 		this.toRemove.push(body);
 	}
 
+	removeCopula(copula) {
+		this.toRemove.push.apply(this.toRemove, copula.bodies);
+	}
+
 	step() {
 		this.world.Step(1, 5, 1 / 60);