Some thurifers genuflect with the thurible pulled in. I like it when they hold it at a constant level in one hand off to the side and genuflect. They have to actually raise their hand as they genuflect, thereby maintaining the height so the thurible doesn’t hit the ground. It takes a moment’s practice, but it looks cool!
The little liturgical preference aside, maintaining a spirit of contemplation is the coolest thing you can do for a Mass and the congregation that is participating. So, above all things, don’t let the cassock catch on fire. It is a little distracting when they have to run for a fire extinguisher.
Now you’re going to be paranoid about it all night, aren’t you.