When a laser loops around and reaches you three times, you suffer complete annialiation, and the beam stops bouncing.

For example, suppose your opponent has a medium red pyramid pointing at you. You have a large red pyramid pointing back at him.

1. Kaxxt fires a red laser at you. The beam bounces to your opponent. One point gets past his pyramid and damages him.
2. The rest of the beam bounces back to you, for the second time. It bounces back to your opponent for the second time (damaging him by one point again).
3. The now-weak laser beam bounces back to you for the third time. Stack overflow -- you lose!