Bumblebee has been fighting airbourne Decepticons for ages, so he knows just hot to deal with them. Grindor may be able to hover well out of range of his weapons, dropping bombs with chaotic glee, but the Autobot warrior still has a few tricks. He weaves through the streets at top speed, forcing the Decepticon to maneuver constantly between buildings. Eventually Grindor will make a mistake. As soon as his roto brushes a building, He'll come crashing down, and then Bumblebee will have him.