Check out the following exercise, guaranteed to freak you out. There's no trick or surprise, but, trust me: just follow these instructions, and answer the questions one at a time and as quickly as you can! Again, as quickly as you can but don't advance until you've done each of them... really.
What is:
1+5 ?
2+4 ?
3+3 ?
4+2 ?
5+1 ?
Now repeat saying the number 6 to yourself as fast
as you can for 15 seconds. Then page down...
QUICK!!! THINK OF A VEGETABLE!
Say it out loud!
Then page down.
You're thinking of a CARROT right?
If not, you're among the 2% of the population whose minds are warped enough to think of something else.
98% of people will answer with carrot when given this exercise.
Pretty Neat, huh?
NOTE: I did not make this test, I got it from here: http://www.funkypages.com/