A Liquid That Turns Solid When Heated
I've noticed something very similar to this effect. Part of my job involves flame testing materials. This one plastic I often encounter burns and leaves a dripping on the aluminum plate I'm working on. The dripping is solid, but when I hit it with the torch, it melts (spreads out thin) but then re-solidifies (all curled up like crinkled paper) while the flame is still on it. When I remove the heat, it just stays at the second shape. I can reapply heat and it will go through the same process.....
Heh, have I made a major discovery??