These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
Crowning Moment of Awesome: When Reki pulls her Big Damn Heroes moment in Episode 3 by saving the students on the bus by shooting a bullet through the guard rails on the bridge, while the bus was moving, into the small bomb strapped to the bottom of the bus while in a blackhawk flying feet above the water.
Also, in Episode 1, Hysteria!Kinji shoots 6 bullets into 6 different uzi barrels, detonating them.
Suspiciously Similar Song: Carl Orff's legendary "O Fortuna" movement from his cantata "Carmina Burana" in episode 6, after Kinji opens a drawer brought in by Shirayuki when she moved in with Kinji and Aria.
Kinji: Shirayuki brought these drawers here. There won't be any hazardous objects lying— [Kinji opens a drawer and gasps in shock as he discovers Shirayuki's massive collection of black and white underwear before immediately closing it] Kinji: There are... and they're hazardous to me.
Viewer Gender Confusion: By Volume 4 we get introduced to a girl named Kana who is actually Kinji's long dead brother, who cross dresses so he can activate Hysteria Mode at will.