there's a massive canister of something there, some more serious and complicated—looking pipes, some dials. and you start to get the impression, yeah, the engine must be quite close by now. and then, oh, actually, no. this is actually the engine that we've been walking past. they've attached it to a building, so at least it's not going to go anywhere. and what's also interesting is how we have to film this test. we have to put our cameras inside these protective boxes, for obvious reasons. and then a whole hour before they run the test, we need to clear out of here, which means we have to run a really long remote control wire for our cameras, all the way around to that remote viewing area, there. we did bring the really long wire, didn't we? main burst in three, two, one.