"We have one rule: you can have body punches and choke-holds and throw bottles at each other, but we never crack each other in the face": What happens when bands fight

A smashed guitar onstage.

Poke any band and you're almost sure to find a hornet's nest of acrimony, jealously and bitterness. It just goes with the territory, along with a steadily accumulating Air Miles account.

It could be anything. A simple clash of personality. An unfair royalty spilt. A guitar amp turned up too loud. A singer turned down. But it's always there. That tension. That unease. That volatility.