Oxen are used to pull ox carts and they still do. For a long time many plied the roads hauling mostly coffee and and other goods. I've only seen one ox cart. Two with this one at a small park.
There were as many as 400 carts a day using this road. So there was some drinking going on and when some guys got too drunk to walk along side their team of oxen to direct them they got on top of the ox cart.
In present day when the local's see an inebriated person they say that phrase "se monto enn la carretta" which translates to "looks like that person is on top of the ox cart".
I think that's is soooo funny. You can go here and see some real ox carts just the way they used to be back in those days.