Quote from PopcornInsomniac
Okay, the big circle is the part that makes the sky light up during a fireworks explosion, that way Mojang wouldn't have to add lighting changes out of nowhere.
For the stuff under potion swirls, those are two different styles of fireworks particles.
I totally forgot about fireworks; sorry, dude.
The real crit particles are to the right of note block particle. The first one is regular crit (jumping, etc) and the second one is enchant crit (bane of arthropods, smite).
Regular hits don't have particles.
Sweet! Thanks for clearing that up for me. Helps a lot!