A Boeing 707 performing un ultra-low fly past at the Harare air show in Zimbabwe, 1995. Darryl Tarr, who performed the daring stunt, claimed the radar altimeter read 6 feet beneath the keel of the 707 at one point during the fly past!I’m pretty sure I remember that the US Navy landed a 707 on an aircraft carrier. Don’t think it could fly back off, though.