I almost just died
What happened? Are you ok?
I was hit by an ice block that flew off the truck's roof.
If you're injured, you should stop talking to me and seek medical assistance.  You don't want to ignore an injury!
I'm feeling fine, I'm not dying.Seriously I'll be fine.
If you have a concussion it might not be visible. A medical professional can better examine you and have a unbiased opinion. Any internal injuries might not show symptoms.