sand to glass.

My idea is if you put TNT or lightning strikes sand it would turn it into glass for the TNT it would blow up stuff in its radius but then if there is sand on the very edge it would turn that sand to glass and for the lightning whatever blocks it strikes turns into glass I think this would be cool to just find naturally forming glass in some places.(I don't know which category This falls under.) Thank you for your time, listening to my idea, and making Minecraft better every day!