[...Okay, he definitely wasn't listening to that part. Ed doesn't have much choice but to keep up the charade, though, and the wide, open-hearted smile he puts on as he takes the toolbox into his hand would probably terrify anybody who'd actually met him before.] Come on, don't talk like it was all me. For a lab this size, you're keeping it pretty well. [He pats the nearest workbench, sending one of the papers on the edge fluttering to the floor.] Just give us a few more minutes and we'll be on our way. No need for you to get hurt while we're clearing up.

[By his standards it's not a bad act... although it would be a better one with anything that remotely resembled an English accent. In any case, the students just stare back at them for a few uneasy seconds. Presently, one of them turns his head and can easily be seen to mouth something along the lines of "the gas valve back there?"]