Peter could probably not break the shields, but if he were to knock out Gokudera, they'd shrink and fall away. Gokudera's feeling pretty clever now that there's less dodging. But the climbing... that doesn't seem right.

"Ah-!" What the fuck?! Is this snot? Gokudera pokes at the web on his cannon and without loading in new ammunition, red fire bursts out of and around it to disintegrate. There's no painful shot aimed at anything, so he's at the moment distracted trying to get whatever is slowing his weapon down off. If Peter is somehow holding on or attached, he may feel the web's grip loosening? The destructive properties are eating away at the web like acid, but not at all as fast as what Gokudera would want.