Walk up to a stranger. Start screaming. Something along the lines of BAHHHHH! will work. You don't need a reason but their face will be priceless.

Walk into a department store. Go to the sock aisle. Start screaming at people and throwing bags of socks at them. You don't need a reason.

Go to a sit down restaurant by yourself. Have a conversation with your alternate personality. The more cryptic the better.

Get fired from a job. Before you leave the managers office, say "You know what I think of that?" then pull down your pants and take a shit right on the floor, then say "That's what I think of that. Eat it off the floor."

Dump random fluids on random peoples heads.

Scare little kids by screaming at them for no apparent reason. Refer to thing to the first on the list for details. Children's tears are yummy.

See a nasty customer yelling at a store associate? Go over and start yelling at them.

See a thief? Scream about it at the top of your lungs.

Doing any of these things makes you a retard. I'm not responsible for your retarded-ness.