MD-80 hard landing.
The video clip was taken during minimum landing distance parameters at Edwards AFB. I seem to recall that an FAA pilot was PIC at the time. The main L/Gs bottomed out but didn't even break any seals and no damage to the wing structure. The tail was replaced and the aircraft rejoined the test program. The only crew injury was to someone standing in the doorway behind the pilots; he broke his ankles.