Tkoc kart race. how can you flip a go kart. dont close your eye from 6min mark

how can you flip the kart !! by hiting rear end with WOT !! the spining wheel will sent you air bone !! i am the driver of camera kart i try to avoid runing into another driver which is lay on the ground due to another accident !! from my experience i know this will be red flag !! so i back off throttle prepare to slow dwon... but this young kid decide still driving in full speed !!!! Each driver are ok. but not my kart !! bent axle broken wheel and bumper PS the incident happend at 6min 25 sec mark