GEICO Honda's Jeremy Martin managed to walk away from this crash in San Diego. He would go on to race in the night show and finish seventh.
RCH/Yoshimura/Suzuki Factory Racing's Broc Tickle will miss the final two races of the Monster Energy AMA Supercross season after suffering an injury during practice.
Take a look at what's in store for riders at this weekend's round of the Monster Energy AMA Supercross Championship in Detroit.
The 2017 FIM MXGP World Championship gets underway February 25 in Qatar with two Aussie riders confirmed for the 20-round championship.