13 "That '70s Show" Easter Eggs Hidden in "That '90s Show"

Red Forman spends a good portion of "That '70s Show" calling out anyone and everyone (but especially his son and his friends) for doing or saying dumb things. His favored phrases are to threaten to "put his foot in [someone's] ass" or just a blunt "dumbass." Time hasn't changed Red that much, as he frequently falls back on his iconic lines in the sequel series, too — and even Eric repeats it at one point!