The Rampancy duo of Narcogen and Blackstar take on level 20 of M1A1 - Two Times Two Equals... What's perfect is that they encounter the same bug twice in that one video: a Trooper exhibiting weird behavior on a platform fires off a hail of grenades. Narco-star survive both times, but they attribute it to something intentional in the game - in fact, it was just a bug, which I will promptly explain:
If an enemy starts to perform an animation on a platform while it's moving, he will become 'stuck' in that animation. If it's a firing animation, there's a chance he'll get stuck on the 'key' frame - that is, the frame where the game says "Hey, spawn a projectile now". As a consequence, the game registers this frame a bunch of times, spawning a whole plethora of projectiles when it only should've spawned one.