A minor one happens when Otonashi, despite Yuri's warning, goes to talk to Angel. Cue the latter scratching her head in frustration.
Yuri: AAAAAHHHHH! I failed to recruit a new member!
Noda killing Otonashi...hundred times. What makes the scene is that Mario 1-Up sounds that follows. Then he resurrects few minutes later, complaining that he missed his punchline.
The entire discussion about reincarnation is pretty funny, like discussing becoming a barnacle and devoured by humans, but the best part is when Yuri forgets the current name of their group and a deadpan "Barnacle Battlefront" is provided off screen. This troper burst out laughing.
Otonashi goes looking around for an adult and comes across the Principal's office. He touches the doorknobs and... cue the pendulum trap pummelling him out of the windows, killing him. Otonashi death count, 102.
When the SSS comes across the Descending Ceiling, TK stops the supports it, telling them to go on in a heroic tone. Cue everyone casually moving on, saying things like "Ok, see ya!" "Thanks!" and after Otonashi, the only one who feels remotely sorry about the whole thing, gets out, TK collapses in a short "Blaarrgh."
The party get dropped in a deep pit and have to form a human ladder to climb to safety. Yurippe tells Otonashi to just grab her anywhere he can so he can climb out. But when it's Hinata's turn....
Yurippe: AH! DON'T GRAB ME THERE! [THWACK!] Hinata:AAAAAAAAAAHHHHHHHHH YYYYYYYYYYYOOOOOOOOOOOOUUUUUUUUUUU BIIIIIIIIIIIIIIIIIIT- (scene change) Otonashi: Where's Hinata? Yurippe:He was a noble sacrifice.
Later that day, after they get to the field, Otonashi pitches the ball....then out of nowhere, Noda pops out strikes the ball...with his halbeldier, challenging him once again. Otonashi catches the ball back, throws it back, and it continues until the judge calls foul on both of them.
In a near Tear Jerker aversion, Hinata, goes to catch the ball, the same way it happened in his past life. He wonders, "I would disappear if I catch this ball, right? But it would be the most wonderful feeling..." Otonashi runs toward him, because he doesn't want him to go yet...then Hinata gets tackled by Yui, who wants her revenge, putting him in reverse swastika.
Hinata tries at distraction, Hinata fails at distraction, Hinata gets sent flying. Takamatsu tries at distraction, Takamatsu fails at distraction, Takamatsu gets sent flying. Ooyama tries at distraction, Ooyama fails at distraction, Hinata gets sent flying.
When Noda arrives and starts hamming it up, Hideki remarks that he's just acting like he always does.
The shadows don't seem to have emotions or even consciousness, but that one that gets chopped up bit by bit by Tenshi's Hand Sonic, seemed really shocked.
Tenshi and Otonashi stealing Yui's guitar to get her pissed enough to give them chase. Instead, Tenshi complains about Yui's bad singing (which was an act) right after the other band members did it. Yui broke down like a balloon losing air. Second try, Tenshi still has Yui's guitar, Yui gives chase, Otonashi stumbles into Tenshi, Tenshi drops guitar. Or rather theatrically throws it saying something like "Yay". Cue almost Face Palm from Otonashi.
Takeyama being interrupted when he tries to say his catchphrase. In episode 5, Yuri turns to talk to someone else when he starts to say it. In episode 11, she hangs up on him.
Hinata's school principal costume in the last episode.
Tenshi's song about Mapo Tofu in the same episode.
From the light novel / prequel manga
Hinata and Yurippe discusses on way to making the god come out. Her idea? kill every single NPC students. Normally it would have been rather disturbing, but it became funny when dumbstuck Hinata’s mouth starts to bleed. Maybe he was striken by aneursym out of pure stupidity.
Ooyama has to come up with a way to delay the headmaster. Hinata suggests flashing him. Ooyama refuses, saying "anyway, you're better suited for that." Then Noda arrives, hearing what they're talking about, and says if they're going to argue about comparisons, they should just show themselves! He then starts taking off his pants, only to be knocked out by a kick to the back of the head by Yuri. After she leaves, Hinata and Ooyama look at Noda — who's lying facedown on the floor, out cold, with his ass exposed — consider pulling up his pants, and decide to just leave him be.
After the SSS swap the teachers' desks for student desks, the headmaster regards his own replacement desk and sits down in it. He then muses about seeing things from the students' point of view and decides to keep the desk, much to the surprise of the teachers.