Every interpersonal situation has a solution in which everyone wins.
The only rule is that there are no rules.
Fall, then figure out what to do on the way down.
The truth is funny. Honest discovery, observation, and reaction is better than contrived invention.
The absolute worst thing you can do in a scene is be apathetic.
Trust...trust your fellow actors to support you; trust them to come through if you lay something heavy on them; trust yourself.