"Much better than acorns- acorns would drive me nuts. I mean I get squirrely without my coffee anyway, no need to make it worse."

Yes he's proud of those two puns.

If he notices the limp, he doesn't point it out, but what does get remarked on is-

"I really need to remember I'm not already infamous around here- Hawkeye Pierce," he offers, "M.D. for what it's worth here. The way things are we'd probably take a horse doctor if it meant an extra pair of hands."