His distraction at being unable to removed the mask cost him. His wand was wrenched from his grip and flew over his shoulder. Dismayed, he watched to see where it would land. It clattered to the ground nearer the veil.
Abandoning his futile attempts to pull off the mask, Barty ran towards his master. He would seek protection from the Dark Lord. He knew his Lord would be pleased to see him once more by his side.
He snatched up his wand, and blindly cast an explosive curse at the ground behind him to prevent pursuit.