Bunks is handed a beer laced with LSD. The drink for the most part is froth. A moment later the glass is mostly filled with beer.
The car chase between Lefferts and Kane goes back and forth between a dirt road and a paved one.
The two rifle shots that Corman fires at Julie and Lefferts make a silencer sound, yet there's no silencer on the gun.
As Arnold Kane's buggy explodes, the muscles of his nearby "corpse" tighten and his body flinches, lifting him off the ground.