diff --git a/robot.go b/robot.go
index 25a4c29..10c8b83 100644
--- a/robot.go
+++ b/robot.go
@@ -268,10 +268,17 @@ func (r *Robot) Tick(g *game) {
 		move_vector := new_heading.Scale(r.Speed * delta)
 		collision, intersection_point, hit_robot := r.checkCollisions(g, move_vector)
 		if collision {
+			dmg := int(math.Abs(float64(r.Speed)) / 10.0)
+			if dmg <= 0 {
+				// All collisions need to do at least a little damage,
+				// otherwise robots could get stuck and never die
+				dmg = 2
+			}
+
 			r.Collision = true
 			if hit_robot != nil {
-				hit_robot.Health -= int(r.Speed / 10.0)
-				hit_robot.Speed = (hit_robot.Speed * 0.1)
+				hit_robot.Health -= dmg
+				hit_robot.Speed = (hit_robot.Speed * 0.5)
 				// hit_robot.Heading = r.Heading
 			}
 
@@ -280,7 +287,7 @@ func (r *Robot) Tick(g *game) {
 				r.Position = r.Position.Add(move_by)
 			}
 
-			r.Health -= int(r.Speed / 10.0)
+			r.Health -= dmg
 			r.MoveTo = &r.Position
 			r.Speed = (r.Speed * -0.5)
 			// r.Heading = r.Heading.Scale(-1.0)