The most embarassing moment of your life

I coughed and farted at the same time in a public place. Now what is your most embarassing moment?

In the end of PE (in the pool) when swimming lesson was over I thought I'd pull a nasty joke.
I went into the shower and well, showered away all chemicals.
When I was done I wrapped my towel around me and proceeded to walk back out to the others (still in the pool, most of them)through the door connecting the poolroom and the showers. I stood there, before all people who were still in the pool, and dropped the towel.
I was pretty certain they'd laugh by now and say something like " Oh Anonymous you rowdy little fellow! You totally had us there!"
I was told my penis was pretty small.
And that was the end of my comedy career.