Insert a time out please,because I always seem to manage in making infinite loops.And I am not joking.
From another user:
If an infinite loop occurs that happens to print something to the screen then the entire website can become unresponsive and it becomes neigh on impossible to actually stop the execution of the code. This can cause some loss of work, and while saving is instinctual to most programmers it's an issue you might want to look into. Otherwise it's a fantastic service you provide with an easy and comfortable interface for some leisure programming.