further proof as to why going over the bump is necessary
but seriously, i would advise teams to cross the barrier and approach the bridges from the side closer to their alliance stations. You can see if there are balls under that side and your tipping the bridge down should dislodge any balls on the far side of the bridge. If there are balls under your side of the bridge then approach from the far side... if there are balls under both... then i'm not sure what you do :/
rock the bridge?