Before he could even think about dodging the leg sweep he heard Natasha's voice and his head turned. It resulted in his hitting the ground hard and he quickly scrambled out of the way. He faced off with the man. He frowned at the man's words. "Who the hell is Buck?" he demanded.
He didn't bother waiting for an answer. Instead he grabbed his Glock off of his hip and began firing at the man. With the stairs behind him though he knew Natasha was going to be on him in a matter of moments. He needed to get back to the master bedroom, barricade himself in and get the machine going so he could focus on this fight.