Yes or No?

Something we almost forgot to add. These crazy guys in Bulgaria shake their head for yes and nod for no. We knew this would be a challenge but had no idea how much we are programmed to read body language over spoken word.
When asking someone: Does this bus go to....? Can I do my laundry? Can I print from this machine? etc and we get a yes answer we have often walked away thinking, 'Gee, they were grumpy' only to realize that it was because we were picking up mixed messages from their spoken word and body language.
We have noticed that people we have dealt with in hospitality who know we are foreigners are very careful to watch our mouths and listen carefully as it is impossible to not nod or shake your head when speaking to someone with either your broken Bulgarian or their broken English.
Eva walked away from a bus thinking it didn't go where we wanted and we met some guys who kept thinking cab drivers didn't want their fare when asking to get to such or such location. The whole experience has been mindblowing and we have tested how much we nod or shake in normal conversation with each other. We can go about two sentences!
Try it at home, it's hard. Let alone in a hurried conversation where sign language is normally your savior!