Some things that make you feel cool
-Rolling into tables and flipping them instantly on contact
-When behind cover, face/point gun away from wall
-Make a verbal monologue w/ a story while playing
-Walking with streams of bullets so that they don't hit you
-Rolling back and forth across bullet streams
-After beating Bullet King, while walking out of room, shoot the Chancellor, if still alive
-Use transmogrification guns against huge enemies (Lead Maiden, Shambling Round, Agonizer, etc.)
-Rolling explosive barrels past Bullet Kin (It distracts them and they try to shoot it) and escaping from being cornered while they're occupied
-Use the Mourning Star or Raiden Coil
-Baiting chasing enemies into traps
-Intentionally reflect bullets with Fightsabre
-Use Relodestone during any attacks that cover most of the screen in bullets
-Use invincibility of any sort during any boss and just stand there, and laugh at their failed attempts to kill you
-Smoke
-Do Drugs
-Cheat at WInchester's game
-Break the Dragun's skull after beating them
-Shower in shells after Dragun
-Roll into frozen enemies to kill them
-Blank a Revolvenant
-Find secret rooms
-Let Pinheads get close enough to jump at you, and roll at the last second to survive
-Make witty one-liners after bosses (Puns work best)
-Rolling into pinheads and walking away because it's a fun bug
-Let a C4 thrown by the Mine Flayer come close enough that it explodes but roll away last second so you stay unharmed.
-Read comments section for more, I'm tired

Yep