[GaryVoshol]

Just guessing, but you may have received a technical foul for G28: "Strategies aimed at the destruction or inhibition of ROBOTS via attachment, damage, tipping, or entanglement of ROBOTS are not in the spirit of the FRC and are not allowed."

If you just hit someone and they happen to go over, that's not a strategy. But if you are pushing them and have them partially tipped, and then either continue to push or move back and hit them again, that can look pretty much like a strategy.