Here's another old cartoon of mine from my high school paper, The Lance.
Today's is from February 4, 1987. Here's a bit of the page it was on:
And here's the cartoon close up:
Other than the really punny gag, this cartoon is actually pretty close to what I'd do now.
On the bad side, note the hand hiding on the patient (classic early cartooning strategy) and the distracting nurse/arrow 'gag.'
On the good side the joke reads left to right well, and the gag's nice and short.
Not too bad.