Well, wonder no more.
Green Day were performing at the iHeart Radio Music festival when Billie was given polite notice that they had one minute left to perform.
This made Billie a very angry young man, one minute was not enough.
So to protest his anger at this 60 second injustice, he lost his crackers right there on stage, shouting more F-words than a night round Eminem's house.
He ranted and then in sort of grand finale smashed his guitar and chucked his mic harder than that Pink impersonator on X Factor.
Live on stage.
Our personal highlight has to be when he squeals: 'I'm not Justin mother**kin Bieber".
We don't mean to laugh, but it's just not every day you hear someone refer to Justin Bieber with such hilarious malice.
Since he lost his marbles live on stage Billie has been lugged off to rehab and blamed the meltdown to 'substance abuse'.
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However, his band mate says he just had "severe dehydration".
Well, don't we all get a bit tetchy when we haven't had a drink in a while?
We just feel sorry for that poor guitar, it only wanted to play a bit of Basket Case.