Anyone who has an older brother knows how annoying they can be, and Chet Donnelly (Bill Paxton) from Weird Science completely embodies this fact. Chet makes an art out of humiliating and abusing not just his siblings, but their friends as well, most of all his brother Wyatt's friend Gary (Anthony Michael Hall), who he taunts and attacks throughout the entirety of the film, while carrying himself with a cocky swagger and the most irritating smirk known to man. Seemingly a role tailor-made for Paxton, he is a lover of firepower (literally) and keenly extorts the two kids, until at the end of the film, he is turned into a grotesque creature called a squat, and finally humbles himself for his actions before being transformed back.