Warning: Some “Furiosa” spoilers ahead.

CANNES, France — Chris Hemsworth has so many scene-chewing moments as an absolute psychopath in “Furiosa: A Mad Max Saga,” they could fill the tank of a massive war rig screaming across the desert. He has perhaps created one of the all-time-great screen villains in his bike-gang leader Warlord Dementus, who has kidnapped a young Furiosa (Alyla Browne) and claimed her as his daughter. It’s also a problem of perhaps too much of a good thing. Like Ryan Gosling’s Ken in “Barbie,” Hemsworth’s Dementus may have the best part — and by far the most dialogue and funniest lines — in a movie named after its main female character.