My very favorite EVER was in a local karate tourney. In the fight right before mine, the guy yelled "hajime!", and one fighter - I don't know what he was thinking - ran straight at the other, and jumped in the air to do a downward punch.
The second fighter, a little Asian TKD dude, cool as a cucumber, stepped to the side, and punched the first guy right on the chin. The dude went out like a light, right there in the middle of the air.
The limp, unconscious body finished the downward arc, and crumpled up in a pile on the floor. It was really cool to see him just go limp in the middle of the air!