Yes, front brake in a turn is a great way to cause this. Basic rider errors in this crash. Tar snakes don't help with confidence but he's clearly decelerating towards the apex which is expanding his rear suspension components and moving weight off the back tire and onto the front. This is the same as hitting the brakes. Combine this with actually adding 1/3 brake pressure and you are just begging to crash. End result: limit of traction exceeded. Steady constant throttle as you accelerate out of a turn ALWAYS. Your suspension has no other way of working correctly.