Another one of those incidents Gaster ended up replaying in his head many, many times. Asgore regretted it all almost immediately, but not before he ended up destroying what was left of his life through his own angry choices.
When Asgore faces away from him, Gaster moves his magic hands to where he’s looking and signs there, but most of the time Asgore’s blocking the shot so you can’t see them, haha (he’s done it before actually).
Caffeine and Rhyme and Nothing's Fine 