I can't possibly relate to all the stories you guys have, as I never spent any time in the service. However, for a little more than a year now, my best friends from school have been Marines. They have been telling me more stories, and more tidbits of useful information than I can ever remember. Among those bits of knowledge they have given me, is how to REALLY have fun with an MRE.
The little MRE heaters and the tiny little bottle of tobasco and a 20oz water bottle can be made into what might be considered a pranksters MRE based tear gas grenade (just add water) There's not much to it, and it works.
Just thought I'd share that since we had fun with it.