That underground sound

There’s something strange going on in a small Wisconsin town. (We know, “small Wisconsin town” sounds a bit redundant.) Clintonville, Wisconsin is rattling every now and then because of some unexplained explosions.

No one seems to know the cause, but it’s been going on since Sunday night. No gas leaks have been detected, and the military doesn’t have an answer. Geologists have nothing, too. We don’t want to sound alarmist or anything, but has anyone seen Tremors?

If it’s not that, than it’s almost certainly an infestation of Viking mice.