A little bit of a duhhhhh there. They flooded the chamber with CO2... Want to enter a room flooded with CO2 without wearing your SCBA? They also probably have regulations that firmly state what is to be worn under what circumstance. Knowing Germans, that is almost a certainty. The rule being going back for your equipment is grade AAA stupid. Always go prepared for any situation.
That is the link I meant to post, thanks. trying to post from my phone sometimes poses these little problems.
I can't believe that they went through all that trouble for a spider. It seems to me that a single person with a can of bug spray could have accomplished the same thing. Of course they could have posted an ad for them on here and they might have made a few bucks, and in the end they could be sure that there weren't any more in there.