There was some luck in the fact that it took a concentrated repulsor blast to decapitate a zombie. A wide-beam generally just seemed to aggravate them. When it came to teleporters (magic zombies), that meant the blast would continue straight on past where they used to be standing and blow a hole out of the wall next to Wanda's head. "Shi-- sorr--," Iron Man scrambled, not taking the time to finish any apology and instead spinning around just to catch that wet squelch again and the creature popping out of sight.
Frozen, listening for any sign of movement above the whine of his repulsors charging and searching the dark hall for the feverish heat signature of the Infected, Tony only turned his head just in time to catch the zombie to lean out of the hole Iron Man had just created in the wall with its demented, lipless, bloody grin turned towards Wanda. It made a choked, stunted groan before slumping forward, hanging half out of the shattered concrete with its knuckles brushing the ground and black sludge leaking from three holes blasted straight through its rotting head.