They will stop in front of you and vibrate, but then they do a very disconcerting thing, which is they jump into your body and then they jump back out again and the whole thing is going on in a high-speed mode where you're being presented with thousands of details per second and you can't get ahold on. What they're doing is making objects with their voices, singing structures into existence. It's not simply intricate, beautiful and hard to manufacture, it's impossible to make these things. They appear to be somehow alive and can sing other objects into existence, so what's happening is this proliferation of elf gifts, which are moving around singing, and they are saying "Do what we are doing" and they are very insistent, and they say "Do it! Do it! Do it!" and you feel like a bubble.
