Horace Tapscott - good point. I missed a solo piano recital in Western Canada back in the mid-90s (low-key gig, really kicking myself for missing that one - a rare Canada tour) then about 5 years later I attended what was to be a benefit performance for him in LA. Turned out Horace died the day before and it ended up being his wake .
John Mayer Indo Jazz Fusions II - Got to the gig (local) in good time as they were setting up, then rushed back home to get an LP for him to sign. By the time I got back the gig had just started and the doors (a church) were locked - very, very frustrating as it sounded great. Mayer was killed in a car accident a year or so after that night..