Actually, the whole sequence was
Spoiler:But the point I was making more was that we've seen how durable he is in the last film, withstanding hits from charged up Black Panther, Spiderman, Hulkbuster and IW Iron Man without serious damage. And Giant Man wasn't even actively trying to fight him. If he can cause that much damage with a step, just imagine what he can do to you if he gets his hands on you and really tries to hurt you.
the first time Tony and Peter met up since everyone being brought back, where Tony was laser and repulsor'ing up fodder when Cull cheapshotted him from behind. Then Tony morphed his arms into a pair of those big-ass blasters he threatened Drax with during the last film, before they get interrupted by Spiderman, who yanks Cull backwards, underneath Scott's foot.