In general Harry is a very cautious man. This time, unfortunately, he was overwhelmed by the black siren that trapped him closer and closer. This siren really made him crazy. In a moment he forgot about all his caution. First she decided how often she let him breath from the regulator later she stopped him completely...

This is the same clip (just lower resulution) as this:

https://www.clips4sale.com/studio/106732/18356253/162-the-siren