Country Calls----the H and S brigade would have an even bigger fit if they had witnessed Gnats being LOX'ed up at night--in the corner (ish) of Gaydon Hangar complete with swirling clouds of vented vapour rolling over the floor and drip trays. Not that this ever happened of course
---or, for that matter, degreasing wheel bearings in non leaded gasoline--masks, gloves ventilation ??---next !.