When you have a full cup of coffee in your hand and you've jut set it down
to the table, when you remember something you still need to get and you
turn around but your finger is still inside the cup handle and you pull it
with you spilling the coffee all over the place.
On that split second, you realize what you're doing so you push the cup the
other way spilling it even more, and then try to cancel it out by pulling it
back and so forth. You end up with a table full of coffee and people
thinking you've finally lost it.