Oh, Dick's fully been expecting him to try using his own healing on himself. It's what Dick would do, after all. So it's not a surprise that Tim is hedging.

Dick sits back against the balcony railing again. "So. Definitely not feeling well enough for a swing? We could tandem, if you're up to it."

After all. When will Tim ever get a chance again to say he swung over Rivendell?