One of the home matches towards the back end of last year, we left the Kop 5 or 10 minutes before half time to get a drink and my mate gave me his half-time drinks voucher while he went for a piss.
Mate comes out of the toilets and joins me in the queue, and the (already pissed up) guy behind us starts having a go. "Oi, no pushing in. Get t'back fucking queue". Explained we were together, and I was collecting both our drinks. We got a load of abuse back, we just ignored him and left him to it.
Just as half time goes and it starts to get really crowded we got to the front of the queue, hand over our vouchers, get our pints and are just leaving when we hear the guy from behind say "What fucking vouchers? What do you mean I can't pay here? Look at the state of the queues now (followed by a load of abuse to the staff)". We almost pissed ourselves laughing at him.