I would return, too.

He WOULD return, but, y'know, he's got, like, stuff to do.

This happened to me once.

A bumbling martial arts thief guy trying to break into a tomb or something.

The watermelon thing seems to be a neigh indestructible penis munching sentry that delivers a rather unkind cut to would be thieves.

I really need to see this movie to find out if he ever gets past it. Or what he would risk his dick to break into the Godforsaken place to begin with for.

This is a truly crazy film from the Yeun Clan. Even beyond the watermelon monster, there's plenty of stuff like accidental urine drinking, the main villian (seen in this clip) armed with his metal balls that fire smaller metal balls at people, the fat lady whose martial arts style consists of sitting on people, and more ca-razy stuff.