Also a Tear Jerker moment, but Lenny watching Frankie die is really... crowning. He really wails, he's really horrified at the accident. He tosses two tons of anchor aside like a cottonball, reminding us that yeah, he may not be musclebound, but he's no pansy.
In fact a lot of the shark's moments are weirdly heartwarming. You do get that they're brothers and they love each other, even if they are different. The Mafia thing really does put emphasis on the family bonds that the Mafia liked to display when they wanted the public to forget about all the Mob War and killing they did. And it's still about family. Which is why it still reminds you of The Godfather.
Frankie's funeral. Look at his mom sobbing. Family, all over again.
"I love you son, no matter what you eat or how you dress."