Do you mean you can catch them and stop them? Or catch them and say "oh I'm starting to feel angry" without letting the anger consume you, but still let it exist. I'd love any elaboration you can share on this
Another way of putting is that I'm self aware that the "qualia" of feeling angry is being projected into my conscious experience as a token, rather than simply experiencing "feeling angry" qualia.
I liken it to being able to set a breakpoint on my emotions, and then single step through the root cause of that emotion.
I seriously didn't have that functionality in my brain before that hero dose trip (even after doing many years of meditation).
Easier said than done, of course!