Hm.... epic pranks.... here are a few me and my boys have pulled...
1. Jello in the toilet bowl... Basically, our last day of school my senior year... I had baseball practice the night before and got a few friends to help me... We had practice really late because we watched film in one of the rooms of one of the pitchers that we would see that weekend... Anyway... I got a few friends to go in and get 15 things of Jello... the cleaer kind... We went around to random toilets and urinals in the guys locker room and filled them with the clear Jello... mixed it up... and let it set over night. When we came in in the morning to get ready for our double header... It was solidified.... One of our pitchers went in to relieve himself and... needless to say... he need to get a new pair of pants for the game...
2. Works Bomb... We use this one whenever we want to scare the crap out of someone... By far the very best one was when we told a friend as we were waiting outside school for one of our other friends... that we had very very important chemicals in a duffle bag for a chemistry project... and that if they happen to mix... it would essentially make a form of mustard nerve gas that would kill anyone within 50 feet within about 2 minutes of initial exposure... He of course didn't believe us.... BUT! We said... "But dude, seriously... keep an eye on this bag while I go talk to James...". He began to get sketchy about it... the seed was planted... So when I came back I had a works bomb in my pocket (I will not divulge how to create a works bomb... because I don't want to be responsible for whatever carnage you cause)... The key is to do everything quickly... With Works bombs... it's essentially a chemical reaction between two things... You have to shake the works bomb and place it in the bag and back away without the person knowing you did it... So I had a friend momentarily distract him as I shook the bottle and unzipped the bag to "check the chemicals" and tossed the bomb in there... Then I said... "Everything looks good... just don't bump the bag"... as I walk away.... I of course "accidentally" bump the bag... Me and my other friend that was in on it both look at each other in horror... and began to back away very very slowly... This is when the other guy we're pranking really starts to buy in on it... Works bombs take anywhere between 10 seconds to 1 minute to go off... depending on how strong you mix it and what size bottle you use... He starts to get an uneasy look in his eye as me and my other friend look at each and began walking slower backwards... Our other friend was sitting down.. he then stands up and begans to walk slowly away from the bag... then.... BANG!!! the bag flies open from the pressure of the small explosion and a cloud of green (made by adding food color) fills the air... It was probably the single greatest moment in my life when the guy turns to run with a look of absolute terror on his face... he starts screaming "GET EVERYONE OUT OF HERE!!! CALL 911!!! OH MY GOD!!!" and as he turns to run away... he NAILS this girl that's just kind of wondering what just exploded and knocks her on her ass... Then we started laughing and our friend figured out it was a prank... I ended up getting in trouble even though my chemistry teacher and principal both told me it was the "grandest and most spectacular scheme either of them had seen or heard of".......... ah... high school days.
NOTE!!!! Works Bombs aren't that dangerous... If they're made in the manner that I made it... However, they can be potentially dangerous if abused.
3. Water Balloons under the seat cover... Pretty simple... you find a friend that has seat covers in his or her car... and you make a few small water balloons up and tuck them under his seat cover toward the back of the seat... when he/she sits down... instant wet ass.
Those are some of the pranks I've pulled in my day... just a few... There are many many more where that came from though... just basic shenannagans... Sorry for the long post... but there's some things for you to consider. haha