The episode of Sealab2021 where Marco and Murphy get stuck in a storage closet and Murphy cold-cocks the maintenance guy when he comes in. When Beard Guy wakes back up later he has the following exchange:
Beard Guy: [groans] My face.
Marco: Oh, you're awake! Excellent.
Beard Guy: When old guy hit me?
Marco: Fix away!
Beard Guy: I think I got my think a concussion.
Marco: Waitin' on you!
Beard Guy: Now. 'cause remember I can't fix stuff?
Debbie: Oh, great! Now what do we do?
Beard Guy: I gotta lay down back... 'cause our concussion had me sleepy. [collapses again]