Akainu punched right through Ace! But it's okay; he'll get right back up just like everybody el...wait...HOLY FUCKING SHIT ACE IS DEAD JESUS CHRIST OH MY GOD

Merry's death.

Brook spending 50 years alone on a ghost ship, kept going only by the promise he and his crew made to Laboon who doesn't know what happened to them and thinks they've abandoned him.

• Should be Crowning Momentof Heartwarming because he continues on in the hopes of One day reuniting with Laboon.

• The Crowning Momentof Sadness is he spent 50 YEARS all alone, while the rest of his crew died, he was the Captain. 50 YEARS.

"I've already pinched my cheek...haa...hard enough to tear it off...!! If this was a dream, I would've woken up by now...this isn't one, is it...? ACE...DIED, DIDN'T HE!!!?"

Jinbei's reaction after confirming it is what seals the deal. It's bad enough to see Luffy break down worse than ever before, but even Jinbei can't hold back.

The moment at the end of Nami's flashback during the Arlong arc when Bellemere is shot.

Robin's past: first she is considered a freak and an outcast for having Devil Fruit powers and is emotionally abused and neglected by her aunt.

Then, in just one day, she manages lose the only real friend she's ever had, found and lost her Missing Mom, watched her home and everyone she knew get destroyed, and then is forced to live for 20 years on the run, constantly getting betrayed for her bounty or bringing trouble to the few that actually allow her to stay with them!

Chopper's past

The measures Oars went through to save Ace (getting shocked, his leg amputated, and pierced through the heart), all because Ace gave him one small gift in the past.

• Crowning Momentof Heart Warming Anyone?

Usopp and Luffy's duel for the Going Merry.

The Straw Hats being separated at Saobady.

Bon-clay's sacrifices. The first and, even worse, the second one, where he basically stayed behind, alone, AGAINST MAGELLAN to open the Gate of Truth for the 241 escapees. Even Buggy was crying, and Jimbei was close too...

Norland discovering that the Shandians and their land disappeared, not knowing if Calgara and the others were alive or not, and because of that he was called a liar by everyone and executed.

Sabo's (presumed) death. Pretty heavily implied that the ten-year-old died, enough to get get me crying.

Whitebeard asking Ace. "Was I a good Father?"

• This is more of a heartwarming example, as listed in that crowner.