I usually forget that my wife (Courtney) was a cheerleader in high school. Since I wasn't around in those days, I don't feel so bad.
But occasionally, she will do something that reminds me of her high school hand-clapping bad-routine flat-bottom shoe ways. Usually when she is doing something crafty (good, not bad) around the house I will see her writing in big bubbly letters and giggle in a high pitched voice and she reminds me that she wasn't always the sweet house-wife that she is now.
For example, this morning she was modge-podging and using metallic pens (and quite effectively I might add) and I made a comment about how I could never do that.
Her reply, "you forget I was a cheerleader in high school, if you had a craft paper sign I would run through it right now."