Imagine being forced to travel the world with three or four of your friends for months on end, sleeping in a small van and spending every waking hour looking at their increasingly annoying face. It's no surprise that band's occasionally end up punching one another.
Of course, the recent incident involving Hollywood Undead is slightly different to this but rock's history is littered with groups giving each other a slap and getting on with the business of rocking out.
From The Who and The Rolling Stones through to Poison, Coal Chamber and Lamb Of God. Take a look at who has seen inter-band chemistry turn ugly and violent in our gallery below.
Band go 'Up In The Air' for sky-high gig
Exclusive shots from one of of year's first festivals
Butler joins the legends to perform 'The Last Time'
Win Butler becomes latest celebrity guest
Arctic Monkeys & Dizzee Rascal? Nile Rodgers & Johnny Marr? Who could duet at Glasto?