a he ties his horse up outside.
after a few drinks he looks outside to find his horse is gone.
'if my horse isn't back the next time i look outside, i'm gonna do what i did in mexico.'
he has another drink, meanwhile a rather timid publican asks the man,
'uh, wh-wh-what did you do in mexico?'
the man sits his drink down and says,
'oh, i walked home.'