Antimatter can interact with matter and create an explosion of energy that annihilates both.

If you take some antimatter out of its containment cabinet and do that with it 5 minutes from now, you’ve done that in its “past” which means it can’t be there for you to procure in the first place.

Or did you, in reverse time, cause a bunch of energy to converge and become matter and anti-matter, and then walk over and put the antimatter away in the cabinet?

It’s reverse entropic as fuck but I guess that’s anti-time for you. Maybe this is how the Big Bang was caused. Anti-entropic flow of anti-matter into a highly ordered state in one point. Fuck.