Lightest. Thing. Ever.
Aerogel is the lightest substance in the world. Like, ever. It's made of 99.8% air. So it basically doesn't exist. Almost. Apparently it's a good insulator, has a melting point of 1,200 degrees Celsius (that's really hot for you Americans) and can be used for electromagnetic shielding and other such things, but really who cares? Just look at this crazy picture! The flame is holding up the aerogel which is in turn holding up the crayons, neither of which is melting. Awesome.