What is the most intersting thing one of your SIMS has done?

When I first got SIMS2 I made a family and moved them in brand new, they had no contacts... out of the blue a SIM they'd never met before comes over, ENTERS the house without ringing the doorbell, and SHOVES the father and starts yelling at him! Then he turns around and leaves. It was so weird!! Anyone else had this or something really strange happen? It never happened again... I have a lot of expansion packs but mostly just really mundane things going on, never even a fire or a burglary. Sheesh...