Women’s Dressing Room, Gabriel Brothers, Monroeville.
A harried mother is in a stall helping her two very young daughters try on new clothes:

[loud slap, followed by a little girl’s wail]
Mother: Don’t you EVER do that! That is dirty and disgusting! Now, why would you even DO a thing like that?
[Little Girl whimpers]

[Several minutes of silence, and then the bottom of a bright red skirt can be seen moving rhythmically in the space beneath the stalls.]

Little Girl: See? It’s a hula dance! We learned it in school!
Mother: Yeah, well you NEVER do it naked in front of your sister like that!