Three thoughts:
I never destroy them - I just drop them off a bridge. They make quite a nice splash (actually two - one as it hits the surface then another as the water closes up behind it.)
I've heard of one guy who took his Grenade, that had just "cost" him a tournament, and, by hand, dragged it down the freeway at 75 MPH. (a major fry)
Or, and I want to try this someday, collect 5 of them, using ball plug place an eye-bolt in the thumb, and make a giant executive toy of them. Hang them from a log, supported by a log frame, so they swing back and forth hitting one another. Should really annoy the neighbors.
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"A little sincerity is a dangerous thing, and a great deal of it is absolutely fatal." Oscar Wilde
Ragnar sure likes to throw his purdy Uranium Buzzsaw.