Last night

 That poor guy at swing dancing, I feel a bit bad for him. 

He asks me to be his partner, so we start learning together, but unfortunately for him he's a good listener who asks questions. 

Pretty soon the dance is forgotten, and I'm excitedly describing how I taught a kid about sender, message, receiver, and noise. I'm acting it out, showing him how I mimicked the body language of paying attention and not to have my student practice knowing when to join a conversation when suddenly I realize three things.

One, everyone else is either dancing or getting ready to leave. 

Two, I am gesturing so widely and talking so loudly that the whole room can hear. 

Three, he looks a little tired.

I look at the time and gasp. 10pm. Where did the time go? I guess it flies when you're having fun, and when you end up so absorbed in describing your passion that you forget everything else exists for a moment.