Motley Crue

Mötley Crüe guitarist Mick Mars says he's "alright" after being knocked over by a 'fan' at a show in Canada on Saturday.
 
The band were playing Primal Scream at Spectra Place in Estevan, Saskatchewan when someone from audience made their way onto the stage, knocking over Mars before grabbing Vince Neil — and subsequently being tackled by security to the soundtrack of a few choice words from Nikki Sixx and Tommy Lee.
 
The show was stopped and the band left the stage. Eventually they returned to finish the concert. "Thank all of you for your concerns about me being knocked down last night," Mars tweeted. "I'm alright; nothing broken. My bodyguard Rhyno got two busted ribs."

The incident is particularly shocking given Mars's battle with ankylosing spondylitis, a condition he was diagnosed with at the age of 19 and which is progressively fusing his bones together.
 
And further adding insult to quite literal injury, the incident happened on Mars's 62nd birthday.