I've been involved in quite a large number of practical jokes over the years, but my personal favourite was while I was in Basic Training, in Orlando.
Another guy I served in the Navy with, named Stephens, and I got up in the middle of the night, went to our Master-At-Arms' bunk with our sewing kits, and spent the next hour or so
sewing him into bed.
We did it right. We untucked the sheet on top of which he had been laying, flipped over the top of him, and sewed a straight, tight seam all the way down, leaving only his head out the top. And it wasn't one continuous seam that would pull out really easy once you got it started.
We would do four or five stitches, and tie a knot. Four or five stitches, knot. For an hour.
When the Company Commanders got there in the morning, he couldn't get out of bed.
We figured there would probably be hell to pay for it, but they thought it was funny, and didn't make a big deal out of it.
On a somewhat related note, there was this other guy in our company that was a complete dick to pretty much everyone. One night, while that Stephens buddy of mine and I were on watch, and it was like 2 am, we were tired, trying to stay awake... suddenly Stephens points up at the wall and says "ooooh!!!"
I looked up, and there was the biggest goddamn cockroach I'd ever seen. That sucker had to be at least
four inches long.
We must have been thinking the exact same thing, because without a word, I went and got an empty soap container (everyone had them)...
It was like this, except ours were all blue, and didn't have a transparent top:
When I came back with it, Stephens knocked the huge Florida cockroach down with a broom handle, and I trapped it in the soap container.
We then swapped it out with the real soap container belonging to that guy that was in our company that treated everyone like shit.
The next morning, everyone's in the head, and this guy comes in to take a shower. When he opened up his soap container to get out his soap, this massive cockroach (who was pissed off from being trapped in a box all night) ran
straight up his arm.
He screamed like a little girl and went running all over the place, out of the head, and out into the hallway and everything, buck naked.
It was one of the funniest things I've ever seen.