From bad to absolute worst:
- The band plays a disco version of Free Bird
- Your 8th-grade teacher-crush, Mrs. Sullivan, now needs a walker
- Diarrhea, on the dance floor
- Finally getting to score with the prom queen from your graduating class, only to discover that she now has dentures and you have erectile dysfunction
- Realizing that that obnoxious chick from Government class — Hillary… Rodham? — still has a crush on you
Your suggestions (or experiences) in Comments.