Ok so when you log on to your username on a computer, there is some noise that happens, can't really describe it but hopefully you know what i mean. There is a way to change this noise. The prank is you download the sound of a gun shot and set it as the login sound. you turn the volume up so when your buddy logs on he hears a really loud gunshot and goes flying for cover lol. Im going to find out how to change the sound and post a better guide now then edit. i just saw this on tv and thought it was funny and wanted to post before i forgot cuz i have bad ADD =P
EDIT: Upon figuring out how to change your sound, i discovered that you can change any windows sound that applies to your computer. That led me to alot of funny ideas lol. orgasm noises, farts, scary screams and whatnot. anyway, Start -> Control Panel -> Sound -> click Sounds tab -> those are all the sounds applying to your windows computer. to change them click on one of the jobs the sound goes off for, go down to the .wav file, click browse and set the .wav to a different sound file. there you go hope somethin funny happens.
sorry for my poor english im american and we dont use proper grammer =P