During takeoff on a wave estimated at 18–20 feet (Hawaiian scale), Foo experienced a seemingly innocuous wipeout and drowned.
The most popular presumption is that Foo's surf leash had become entangled on the rocks, with the rushing currents of a second wave passing overhead preventing him from disengaging his ankle strap and getting to the surface.
This theory was further validated when professional surfer Mike Parsons, who wiped out on the following wave, said that he came into contact with something, possibly Foo, as he was tumbled around underwater.
[citation needed] Foo's body was discovered still tied to the broken tail section of his board[1] inside Pillar Point lagoon over two hours later.
[4] Foo helped elevate the popularity of the sport, with his talent, courage, and enthusiasm, and was recognized as one of the greatest big-wave surfers of all time.
Proponents defend the leash as a useful convenience and insurance against losing the surfboard, which serves as flotation device in the case of a "wipe out."
[5] American rock band Seventeen (later known as Lustra) performed a musical tribute (misspelled as "Mark Fu") on their 2000 LP Bikini Pie Fight!.
The epic battle between Foo and Ken Bradshaw in the 1980s is chronicled in Stealing the Wave by Andy Martin (Bloomsbury Publishing).