Can't believe we're actually learning properly about Shanks after 28 years now. Feels fucking weird. Like wrong even. Unreal.
Not that I actually like any of this shit but oh well.
He froze his tears to not let BBP notice he was crying
As someone said here too, he also formed the icicle where Shiryu stabbed Garp to block the wound and freeze the bleeding.
But people will see Kizarus crying fave and think he was going all out and not emotionally distressed and thus nerfed somehow.
Oda has said in story that emotions affect strength, Sanji the prime example of that especially and also a sort of parallel to the Admirals himself too, Luffy vs Katakuri mentioned emotional disruption/instability prevents the focus needed for future sight etc.
There's still a lot of unexplained abilities in one piece too.
Oda has teased about at love and spiral powers being some of the greatest powers/forces, he's definitely inspired by the golden rotation too and makes me think of fairy tail (emotions and friendship =power), part 7 of jojo and gurenn lagan too for spiral energy powers and such.
He's mentioned it affecting the entire world itself and was using Sanji as part of his example. devil fruit spirals, sanjis unexplained flames and spiral eyebrows, spinning to make diable jambe etc.