Oh, it was loud - But I don't care about volume, I always wear earplugs. Once your hearing is gone, it's gone.
The concert in Frauenfeld was in a wooden barn (okay, that's exaggerated, but not much). The whole building was shaking
Besides that, it was extremely hot and humid inside. Water was running from the walls!
I've been inside for Rose Tattoo (maybe 20 minutes, then I had to leave, clothes soaking wet! Luckily it was a very warm and sunny day and evening) and for Motörhead, of course.
They were playing for 55 Minutes, not even Overkill as last song.
Lemmy seemed to be pretty pissed, some idiot threw a beer cup at him right at the beginning, they left stage for a few minutes. After they returned, Lemmy said "once more and the show is over".
Of course the usual drunken idiots didn't stop, might have been the reason why they only played one song as encore.