Was doing some litter picking volunteering with my local group this morning lad and almost got killed by one of those whipped cream nos canisters the spastics inhale. I put an angled screwdriver head gently into the top to expel the gas (as I'd done with hundreds of ones before it) and it decided to blow the fuck up and shot the brass valve whizzing past my head and deafened me for a few seconds.
If only you knew how bad the litter problem is about to become.