There's nothing like the perfect senior prank, but the lengths some teens will go to achieve it is striking. For some teens, being known as the person who pulled the perfect senior prank is really important. At many high schools, the prank is organized by dozens of people. And as the folks below told with their own stories, the results can be legendary and hilarious. Just don't get caught! A common punishment is not being able to walk in graduation, and no grad wants to miss that. It seems that…