“Doctor? Are you alright?” Martha was understandably worried; the Doctor definitely wasn’t himself, and while she was a medical student well into her residency, she wasn’t studying alien medicine. All she knew about the Doctor’s physiology was that he had two hearts, information that didn’t help in the slightest.
“I’m fine. Better than fine! I’m brilliant!” The Doctor swayed unsteadily and Martha grabbed him before he could fall. He was heavy so she propped him against a convenient wall.
Maybe he had concussion; he’d hit his head pretty hard.
“How many fingers am I holding up?”
“Yep, definitely concussion.”