A bloke walks into a pub with a meat and potato pie balanced on his head

He walks up to barman and says:

'Can I have a pint of bitter, please.'

'Certainly,' says the barman and starts pulling a pint. But he can't resist asking. 'You do realise, sir, you have a meat and potato pie on your head?'

The bloke replies: 'Yes, I always have a meat and potato pie on my head on a Wednesday.'

'Ah!' Says the barman. 'But today is Tuesday!'

'Oh no,' says the bloke. 'I must look like a right twat.'