From the movie trilogy Lord of the Rings.
Samwise Gamgee is
Frodo's friend who regularly ventures into bouts of cheesy sentimentalism and/or
reminiscence. To do so is to act in a samwise manner.
A: Whoa, we almost died in that
car accident.
B: Yes we did. It really makes me think about the
fragility of life and how important you are to me.
A: Dude, don't get all samwise on me.