Joly, now watching his work on Hal's arm, doesn't turn to give Harry a Look. But his eyebrows lift in amusement. "I wouldn't say that. But if you're going to be proceed without caution, you can at least make up for it by coming here afterwards--now you see how simple it all is."

...Well. Simple to do, for someone who's spent years training and studied intensively since arriving in Milliways and watched the other doctors here work, probably none of which applies to Harry. And Joly would like to think Harry would just know that, buuuut.....

"Just make sure you actually see one of the doctors here, all right? These machines are wonderful, but they aren't magic; and you want to be sure you're with someone who knows what they're doing. But there's usually one of us in the infirmary now."