What should a rider do during an endo fall?

During an endo fall, the appropriate response is to tuck the chin against the chest. This action is critical for protecting the head and neck during a fall. When a rider performs an endo, which occurs when the front wheel of the bike lifts off the ground, the rider's body will begin to pivot forward. By tucking the chin, the rider minimizes the risk of head injury by keeping the head closer to the body and reducing the likelihood of the chin impacting the ground. This position helps in managing the impact when falling, allowing for a more controlled descent rather than a harsh collision of the head and neck with the ground.

The other options, while related to body positioning, do not contribute effectively to safety during an endo fall. Keeping arms extended may lead to injury as the arms could absorb the brunt of the fall. Keeping feet flat on the pedals could hinder the rider's ability to maneuver or adjust their position to mitigate the fall. Spreading arms wide for balance is a tactic that could be effective in certain riding scenarios, but in the event of an endo, this could expose the arms to injury. Thus, tucking the chin is the best technique to protect oneself during this type of fall.