@grickle
The spearguns remind me of a Sherman's Lagoon cartoon week where Sherman's indolent brother shows up unannounced to stay at their place, much to the annoyance of Megan.

He soon winds up dead from a spear, and Sherman becomes Sherlock for an episode or two looking for clues.

The denouement comes when Megan confesses that she accidentally killed him while cleaning the spear gun.

"I had to clean it twice; I missed him the first time."