Contestants on 'Wheel of Fortune' are under a lot of pressure during the game...and sometimes that leads to some strange reactions when it gets to their turn.

I can understand accidentally repeating a letter that's already been called that round or even making weird guesses at the puzzle, but what really gets me are the vowels. Everyone knows that vowels cost, so why would anyone want to buy a vowel as their last play before they solve a puzzle?

Even more, the people who forget which letters are vowels...I know it's a lot of pressure, but how many times in school did we all learn that a, e, i, o and u are the vowels?

Check out a funny vowel mix-up here: