According to this story  in the U.K. Daily Mail, a Swedish family was terrorized by a 15 inch (not including the tail) rat that made it’s home behind their dishwasher.  Their first clue that there was trouble afoot:  the cat refused to go into the kitchen.

Artist’s depiction

The pros were called in and got out the “industrial sized traps”.  The rat took the bait, the trap snapped, and the rat took off with the trap around his neck.  According to the homeowner, the rat crawled under a plant and “choked himself to death”.  So apparently a suicide.  I’m not sure if that will qualify the rodent for entry to Valhalla.