Maybe you started a band and made your friends pay far too much money to come see you play the terrible songs you wrote. Or maybe you got a tattoo of a Stoke City player on your arse.
For this one fan, he might live to regret this tweet ahead of Stoke's League Cup tie against Chelsea.
https://twitter.com/Smiggy/status/659088811465547776
Of course Jose Mourinho's side lost 5-4 on penalties after Eden Hazard missed his spot kick, and people took notice.
https://twitter.com/petercrouch/status/659169712652328960
The worst part? He's not even a Stoke fan. According to his Twitter, he's a Sheffield United fan which means that not only did he see local rivals Sheffield Wednesday record a famous win over Arsenal, he now has to get the tallest man in football etched onto his arse.
Remember folks, be careful what you tweet because the internet never forgets.
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Peter Crouch replies to fan who promised to get a tattoo on his arse if Stoke beat Chelsea