What's the worst thing that ever happened while you were interviewing parents?

I was interviewing downstairs while my husband was watching my 2 year old daughter and 1 year old son upstairs. Then all of a sudden we hear a loud BANG followed by my one year old crying hysterically. I excused myself to go check on what the heck had happened. Turns out they were in the bathroom when he started whimpering. My husband turned over from wiping his hands and saw my son's hand was pinched in the door. In his rush to get to him, he basically brought the whole towel rack down and scared my son some more. That's why we heard the bang and then the crying. Anyway, needless to say those guys didn't sign with me.