Peter can see that the kanima is breaking loose from the first round of webs, so he knows he needs to think quickly. This section of hallway is not very defensible, and besides, the longer that Stiles is within threat range of this thing, the more distracted Peter's going to be.

"Go find somewhere to get it set up. Shout for me when you're ready." Then, turning to the kanima, Peter starts running forward, shooting another bout of webbing to turn it and drag it away from Stiles, down the hallway in the opposite direction.

"C'mere, big guy. You and I are going to have a little chat."