1, keep your body at a low center of gravity (bend your knees).
2, practice in advance, to determine the order of action (who first 1, 2, 3, 4 in order. Responsibility).
According to the width of the river, calculate the position of the bridge and try to jump over it for the last time to save time.
4. Be careful not to covet speed, slow and steady, and avoid falling into the river.