Got a rattle can of Helmsan polyurethane to coat a plywood fixture that's going to get wet. Well, all went well for the first two coats, but halfway through the third, with about a quarter of the can used, the damned thing stuck open and wouldn't stop spraying. I tried pulling up on the nozzle and that just made it start shooting out the top after the nozzle came off. So I sprayed the basement steps until it was empty (I would really rather have swept them first but putting something on them has been on the to-do list for a while so it wasn't a total waste).
Never had that happen before, usually they clog before they're empty.
Annoyign thing about this one is that I can't even take it back for credit--who's gonna believe that I'm not just trying to mooch a freebie after I used it up?