omg the same guy told me another one today...this time its worse...and can be confusing if you're not familiar with basic chemistry:
a polar bear jumped into the water and disappeared forever. Why?
because he's polar, so he dissolves in water.

...when he told this, only the really smart ppl with insanely high grades found this funny...
heres another one:
they locked a mathematician in a room with a can of food and piece of paper and a pen . he's supposed to find his way out of the room before he starves. few days later, they went to check on him and went into the room. the piece of paper had number written on it, and then they heard a sound from the can. they opend it and found the mathematician. he said, "I'm a topologist and i got a negative sign wrong in my calculations."
get it?
when i heard it i was like WTF.....
