Best flashback feat of the Strawhats?

[Warmmedown]

What's the best feat? Could be the strongest. Could just be the coolest, most "I'm worthy of the pirate king's crew"/I'm a fkin badass/you won't KO me with conqueror's haki cuz I'm a baws.

Is it Franky trying to stop the sea train?
Franky rebuilding his body?
Chopper finding the poisonous mushroom (he kept searching despite getting scraped up and injured lots)?
Sanji eating all of Zeff's food (lol)?
Zoro's first training after Kuina's death (probably more than what 99.9% of real adults could do)?
Something Luffy did with Shanks or with Ace/Sabo (heart still sinks slightly over Ace not being with Luffy/Sabo)?
Brook playing a final song for his crew?
Robin...nah, couldn't even TRY to stop a buster call

 

[SSJ2]

Franky taking on the sea train was probably the most ridiculous. How the fuck did he survive that?

 

[Warmmedown]

Yeh he's literally just a human kid. Meanwhile Kuina dies from falling down the stairs.

Wonder if he could stop it now.