R.I.P.

Freestyle motocross champ and X Games gold medalist Jeremy Lusk passed away on Tuesday in Costa Rica due to head injuries from a motocross injury last Saturday.

He encountered swelling to the brain after crashing head-first while attempting a backflip.

Lusk was 24 and is survived by his wife, Lauren Lusk.

So young. So sad.

[Photo via Getty Images.]