Lemmy walked off stage four songs into the Salt Lake City gig last week, blaming breathing difficulties on the altitude. He managed just three tracks in Austin. The San Antonio show went ahead without Motorhead, as Saxon stepped in to headline.

In a statement, Motorhead say: "As you might have heard, Motorhead again had to abbreviate a performance due to Lemmy not feeling well. This is a direct follow-on from the altitude issues in Colorado and, clearly, Lemmy tried to get back at it too quickly.