The best laid plans

I don't know a hell of a lot about robbing banks, but I'm pretty sure this isn't the way you're supposed to go about it:

Would-be robbers in Germany had to flee empty handed after blowing up everything in a bank except for where the money was, police said on Wednesday.

[...]

"The explosion was so big, they had to run away without the money," said local police spokesman Niels Borgmann. "Something evidently didn't work the way the robbers wanted it to."

I'm pretty sure it doesn't currently exist, but once someone establishes the World Understatement Championship, I'm nominating that guy.