I have a question... I always see comments such as 'always negotiate before you get in the cab'. I prefer the get in, look them in the eye & head nod method; like you already know what its going to cost; then you give them what you feel/know it costs followed by another 'respect nod'. Never any issues. Has anyone out ever run into a situation where the cab tried to charge more once you get there? Just wondering why people always say negotiate first. thanks