“Steve knows his part,” Sam says, helping Bucky tug up the leather pants he’s wearing as part of his costume. It’s painfully hot in the back of the van they’ve both been sitting in for 4 hours, and the pants aren’t going on as easily as they had during dress rehearsal. The fact that a room full of incredibly smart people who don and shed personas easier than they hold personal conversations hadn’t considered the heat a factor is suspicious to Bucky.