"My dad says butane's a bastard gas" - Bobby Hill But yes, this is the case. When you hold the butane flame near the snowball and look closely, you can watch the portion exposed to the flame melt and nearly instantly get pulled into the snowball like a sponge pulls in water. Very similar structure to a sponge when packed loosely by hands. I saw the video and had to try it myself after getting weirded out.