I've had that happen. An instant before it happens, I either just know it's about to happen and I can't stop it, or I do something stupid (such as pick up a piece of food and move it across the kitchen without a dish under it). As it's happening, I'm thinking "this is really dumb. I shouldn't do it!"
Also, lately I seem to be dropping and spilling just about everything. The other day it was an italian sausage (it was that thing I mentioned above about not using a plate, and it was speared on a fork). I had just said to my husband, "Oh, you thought there was one sausage left, but there are two!" (just had to say something, didn't I?)