I think the law is going to disagree with you.<quoted text>
Jumping from a highway bridge is illegal in most places and parking one's car in the middle of the bridge would be reckless.
The larger point is that you cannot be held responsible for that which someone unknown to you does voluntarily.
The suicide jumper leapt from a pedestrian bridge over a river. Recklessness would be the drunk trying his tightrope walking skills out on said bridge.