Passage: Lang is soon able to help Pym and Hope escape custody, and they find the lab. Lang and Hope distract Ava while Pym enters the quantum realm to retrieve Janet, but Burch and his men also attack Lang and Hope which allows Ava to begin forcibly taking Janet's energy. Luis, Dave, and Kurt help incapacitate Burch and his men so that Lang and Hope can stop Ava. Pym and Janet return safely from the quantum realm, and Janet voluntarily gifts some of her energy to Ava to temporarily stabilize her.

Question: What did Dave do to Burch to help the Lang?
incapacitate