he who hesitates is toast

He grabs automatically for the girder with his left hand as the dome smashes apart and hangs there above the Potomac, watching in horror as Steve falls, the same way Steve had watched while he himself had fallen into an abyss of snow and pain and darkness so long ago.

He won't let it end the same way. He waits only long enough to see where Steve's body hits the water before he lets go, plunging deep into the river before he jackknifes into a dive and swims down after Steve.

Even this deep, light gleams from the metal of his arm as he reaches for him.