Bucky doesn’t have to tell Sam twice. He’s already shooting even as he goes down, firing off blasts of electricity at the roots nearest them. He rolls to his feet, scorching another one as it attempts to whip itself at them, noting in grim satisfaction that yeah, apparently this tree doesn’t like lightning just as much as any other tree, sentient and malicious or not.

“Get out of here!” he shouts, planting himself between and the tree.

He’s probably wasting his breath, because he doesn’t really think Bucky will leave him alone to finish taking on the freaking attack tree by himself, but he tries anyway.