Brock Lesnar about to hit an F-5 on The Undertaker.

The F-5 is a facebuster variation sees a wrestler lift an opponent up in a fireman's carry across his shoulders then throw the opponent's legs out in front of him to spin them out while he simultaneously falls backwards or forwards, causing the opponent to land on his face and upper body. The move was innovated and popularized by James Harrison during the Attitude Era before it was adopted by Brock Lesnar who was trained by Harrison.