Put magnets under shoes,
have a light, resistant, fully metal board around skateboard size but flat.
Put 2 powerful magnets on board so that they clip easily on shoes and dont come off too easy.
Run with board in hand towards a rail/urban box feature. Jump, throw board under your shoes, grind the shit out of anything, jump at the end of feature, unclip board, boom walk away like nothing happened.
Is this actually doable? Is it cool? Do we need more grinding urban snowless sports? (Hell yes). Maybe im just too high for nsg i dunno, fuck i wanna grind some stuff.