gMS's Demolition is different?

Exactly what he ^ said. When another person is looking at a fourth job Brawler using Demolition, it looks like the skill isn't executed until after the transform sprite returns to its normal position. However, when the person using the skill is looking at the animation, he sees it coming out while he's 'invisible.' Thus, it's simple to conclude that someone else was recording Seiishiko, not himself.