Funny Pepsi Machine

My friend and I just decided to get 2 pepsi's. We walked to the teachers lounge, took out the money to get the soda's and inserted it into the machine. The two dollar bills went in, and 8 quarters came out. After repeating this process about 12 times we decided to call it quits. Especially after  my friend put a 10 dollar bill in and the same thing happened. Best Experience EVER! lol.