Yes, I know about the masscons, but it seems highly unlikely they'll be just at the right point. It's hard to believe that any object given a single impulse at ground level, in a vacuum, is not going to hit the moon again in one orbit (unless it is given escape velocity).

Masscons did perturb the Apollo missions enough that they had to switch to a doppler radio to navigate accurately.

Don't forget electric fields are involved too on Moon. They are strong enough to levitate the dust sometimes.