Concussions have become so commonplace, the term is being used as an analogy outside of the sports pages. From
food descriptions:
"The cucumber was crisp and juicy. Above the sweet, fresh, salty, marine taste of the geoduck, other flavours spun around like the stars of a cartoon concussion"
...to
veterinary diagnoses:
"...the owl had been hit by a car about three weeks ago and was sitting on the side of the road with a concussion and an eye injury.
Even in the sports pages, the term needs creative modifiers, as in this
minor league re-cap:
"Bell was later taken from the arena on a stretcher, and was hospitalized overnight with what Phoenix coach Brad Church called "an extreme concussion."
Extreme concussion?