One of the most tedious concert experiences I've seen was the otherwise great Ultimate Zero tour put together by Eddie Jobson in 2009. Both Minnemann and Simon Phillips got solo spots, both of which seemed to go on for days. Another time was a few years ago when I saw the Anderson Ponty Band. Rayford Griffin did a solo that seemed like forever, and then he paused. After about 10 or 15 seconds it seemed like the rest of the band was going to come back on stage, but no... he started up again. At that point I heard some guy in a nearby seat go "Really?".