A funny incident that still makes me laugh is the first time I had kitchen table sex. Well, I usually have sex with my socks on, because it feels awkward wearing absolutely nothing at all. I used to wear a chain but then opted for socks as they help keep me warm and don't interrupt positions to fix.
Back to the kitchen table. I lay the lass down, stand infront of her, shove it in, grab her thighs with both hands (standing missionary or whatever it's called), and my feet slide backwards on the ceramic. She didn't notice so I put one foot forward and thrust again, and that leg slid back. So I brought forward the other one. And again, I thrust, and slid back. I kept alternating feet, until about 5 minutes later when the girl noticed and asked "Are you... moonwalking?"