Drunk at 4 in the afternoon.. please!

What do you do when you are with two friends in a park cafe and suddenly one of them leaves and comes back with a big glass of beer for you... You accept. Since I haven't been drinking that much lately.. well I got drunk, and had to be led to my bus stop so that I could go home and sleep it off..  Of course a drunk person will also fall asleep on a 40 minutes bus ride and well.. I did..