Continuity mistake: Cheryl is wearing a cast. When she goes outside to talk to Ruby, she isn't wearing it. Later in the episode, in the bedroom with Jim, the cast is back on.
According to Jim (2001)
1 mistake in Cheryl's Old Flame
Starring: Jim Belushi, Courtney Thorne-Smith, Larry Joe Campbell
Andy: I once walked in on my Grandparents doing it. I mean, Grandpa's in his 70's, but he was really putting Nana through her paces.