So, you have an immortality Quirk. Of course, Denki didn't really know this. Like he knew you had a strong Quirk, but he didn't know you were immortal. Or that you could survive massive damage that would kill the average Quirk user.

As a consequence, he was not prepared to see a gaping hole in your stomach from a training accident, your digestive system having a little cameo appearance. His eyes were wide, and all he could do was stare at the very thing that disgusted him so deeply.

"That... is a stomach. That is your stomach. I... shouldn't see that."