On 3 Oct, 23:31, (Andrew Gabriel) wrote:
If the cylinder
falls over and hits the neck on a wall, the PRV will snap off, and you
now have a heavy unguided ballistic missile which is capable of punching
holes through walls as it rapidly discharges its contents.

Whilst hardly safe, diabatic generation of CO2 gas from a cylinder
full of liquid isn't in the same league as knocking the end of an
oxygen cylinder.