His tale was retold to us in boot camp together with documentary footage.
Summary:
1. Idiot is sent to patrol perimeter, gets bored, leaves patrol. Finds some place on-base where another idiot left several unattended LAWs [!!].
2. Idiot starts playing with the launcher tubes and accidentally causes one of them to unfold to its full length. The idiot tries to fold the tube back. As he has no clue how to do so, he panics.
3. Idiot places tube on the ground and tries to lean on it with his stomach to make it close. When he fails at that, he starts pushing whatever looks like a button or latch on the surface, still leaning on the tube.
4. Hilarity ensues.