He only used it once and you could assume that it was only because Kaufmo was probably a lot stronger than he is. Also in the clip you can see that theres a bunch more abstracted down there so it looks like he only did that to Kaufy because of his condition
I mean, even if he did try to TK and BFR Sans, the funny bone man would just teleport away before Caine could really do anything. I'm not exactly confident in Caine's ability to dodge Sans's Danmaku, Gravity Manipulation, or Sans just teleporting the ringleader into his attacks, which will almost instantly one-shot due to his Durability Negation. I'm pretty sure Sans stomps here. The only way Caine might have any chance of winning is if he was bloodlusted, but Sans would probably still win with low difficulty.
Caine can just use the space hax to phase through everything to be honest.
Caine used his space hax once to exit an area. It wouldn't help him against Sans teleporting him into his attacks, and Caine doesn't really show enough combat intelligence to assume that he'd resort to space hax rather than just trying to dodge normally or trying to tank/avoid with his Toon Force. If Sans's attacks touch Caine once, it's wraps. Caine could abuse his space hax with prior knowledge, but he doesn't have that here.
