In a pressure cooker the vapour has not many options: going through the security valve or making the cooker to explode. I don't think that's an accurate "descri

In a pressure cooker the vapour has not many options: going through the security valve or making the cooker to explode. I don't think that's an accurate "description of factors", unless you take into account the killer is crazy, in which case the most important factor is precisely that.