Simply put, it's when one comes up with a thought, action, or saying that makes the user look like an idiot. From inventing odd techniques, like the drill or the jackhammer, to coming up with sayings that have no relevance in anyway to the current moment or conversation. Don't be sad though. Everyone has a moment or two. Some just have more than others.
Running into Family Mart while doing the drill in mid-air was a proud moment for everyone who saw.
You can stick that into your box of proud moments now.
Created after the orginal thought of the drill, the jackhammer takes speed and power in order to work. Start by creating a fist. Then, get into a stance that will allow maximum power and speed. Arch your back forward and thrust your fist through your other hand, in some what of a punching motion. Try to build up speed. That is the secret of the Jackhammer. Kids, don't try this with grandma in the room.
"Your Drill's got nothing on my Jackhammer"
"Why don't we just stick the Jackhammer in with all the other tool techniques."
"I hope you're proud. Damn you drill and Jackhammer!"