Magnesium dust. POOF! +1 for creadive spellig ;)
tptquantum: It is very much possible to make moving solids. Jacob1's mod has a ball thing that can bounce an rotate.
for RIRN it could not possible because it's a moving solid. But +1!
funny you say Gallium... I've got some just next to me that I'm dissolving tin in to lower the melting point. TIP: ALWAYS leave your Gallium under mineral oil when done using it!!! It oxidises like crazy!!!