If anyone tells you they have a wasp nest and are going to treat it themselves then get them to watch this clip. Wasps behaviour can change in literally seconds and a true professional pest controller will be able to notice a change in behaviour early or even predict their behaviour and allow for this when treating a nest. When I surveyed the nest in the clip I was aware of there busy activity and they appeared very volatile so I prepared for the treatment knowing they would get very aggressive very quickly and wanted to record it. As soon as I treated the wasp nest by injecting some powder I shut the window immediately and started to record. If that was someone trying to treat the nest it could of gone horribly wrong and that's when people get seriously injured and even end up in hospital. Why would you risk it and end up with the possibility of getting seriously injured. Get a professional in who knows what he is doing.