The Perfect Prank.

When my little brother turns 21, I will take him to a bar and get him wasted. While we are at the bar, I will have a team working on his bedroom. For 24 hours, they will be painting his walls white, pulling all the stuff out of there, and tile his floors to make it look like a hospital. Then they will set up a hospital bed, a heart monitor, curtains, etc. Once I hear the room is done, I will put him in my car and drive to a professional make-up artist to put an old man mask and other stuff to cover his body. I will procede to get myself an old person costume including my sisters and his friends. Once we are all set and dressed up as old people, we will put him in a realistic hospital gown, and onto the hospital bed. we will hook up him to a bunch of different machines and wait for him to wake up. We will then tell him a story about how he drove home the night of his 21st birthday, and how he got into a horrible car accident which caused him to be in a coma for 30 years. and we will see how long it takes him to figure it out.
plus his reaction to all of this would be priceless.