Sans hasn't been flying high or anything, but floating on wing has just been his way of things when fighting. He isn't really expecting that blast of wind to catch him despite the fact that he's attempting to shift intangible. He sees the spikes start to raise, and he recognizes the scheme immediately - just like a trick out of his own book. One he's seen many times before.

Peridot is the first thing that comes to mind in this situation. Lambert has his crazy Earth Spirit possession magic thing going on, but Peridot isn't really a fighter in either world. Not that he thinks he remembers? So, he uses what boost he can get from his wings and launches himself in Peridot's direction instead - and manages to lift her up in time for one of the spikes to pieces straight through his torso.

...You know, in the harmless gap between the ribs kind of way. It mostly just ruins his hoodie, for now.

"Heh heh," he manages, still holding her up above himself and away from the spikes. "Whoops."