More than enough time to...well, Tony didn't know what was going on yet, but twenty minutes sounded like plenty to him. "Noted," he acknowledged, dropping his repulsors to grab the door and pull it open. If there were uninfected people in here firing off guns and Tony had just trapped a zombie with them, the least he could do was apologize. Then maybe get them the hell out of here before those others busted out of Spider-Man's trap. He left the door open for Spidey to follow and scanned the area for heat signatures to sketch himself a map.
"I got at least three over here," he announced, carefully edging around a dividing wall. He didn't have to get far to spot the spatter of thick, brown blood and raised his weapons again when he rounded the corner. The zombie, if that was the same one, was a smear on the floor, what was left of his head a pattern on that wall, skull and brains slowly seeping down the polished white. Iron Man's count was right, though, and three people still stood, two holding guns and the third bent over the mess with rubber gloves and an apron. None of them seemed as shocked to see Iron Man as he was to see them; one of the armed ones actually smiled, though it was a twisted expression that didn't suggest any hint of warmth.
"That's a live one," the man noted and raised his gun.
"What--" was as far as Iron Man got before the first round was fired, scattering off of the curve of his breast plate, followed closely by a second. The double hit was enough to push him back, squinting in the spark caused by the ricochet. He was going to stop going in first, this was just embarrassing.