The rollers I had were IIRC called "State Aluminum". Anyone remember these? They were yellow painted aluminum rollers with a red steel frame. I rode these in my folks' basement also. Only fell off once, after spacing out after doing a hard interval workout.

BITD, if a new rider showed up for a club training ride and they were too squirrelly to ride a paceline, they were, um, 'encouraged' to ride rollers for a while.