lolz!
Cat one - .... O_O... makes you wonder how he found out how his cat likes to get spanked with like a friggin wiffle paddle lol and then did he buy those ..things to spank his cat with or they somthin else
Xp prank - lol ive done that one before.. another funy one is to change the handicap settings just right so the keyboard dosent work unless you hold down a spefic button for about 9 seconds so its like uber lock up lol then just lock there computer and walla... they arnt going to get in for a while...
problem is if you use the powerbutton then restart the setting is not activated till you logon so they can logon but then the keyboard is useless again XD.. then you can always change the mouse files to invisible ones lol. ..
or you can just create a simple program that spams an error message style pop up so you HAVE to click ok... have it spam for about 5,000 times they will hold enter for a while... After they find out how to use there keyboard XD...
~Shougun