Booth sat in Brennan's office his head throbbing. Brennan walked back into her office holding an ice pack.
"Here, put this on your occipital."
"Bones, I didn't hit my eye. I hit the back of my head."
"Which is the occipital bone."
"I thought the occipital was your eye."
"The eye is an organ, not a bone. Occipital not Ocular." she said sounding out the names.
"Thanks Bones, I think I got it." Booth said taking the ice pack.
He looked at her, smiled and placed the pack on his eye.
"Booth!" She said smacking his arm playfully.