Because it's made out of vibranium.
What's Captain America's shield made of Vibranium. What's Hawkeye's shield made of Quicksilver.
Vibranium. What is Hawkeye's Shield made of **Quicksilver**
RUFF!
A running gag.
A Star-Spangled Banner.
Because a black widow has no husband.
He was sappy
Because he's Indie!
Quicksilver