Next to the vendor's right hand, are the basket of the fermented tofu... locals love this stuff. Strong stomach bio-organisms a pre-requisite to taste this delicacy. Suspect this guy will sell out in a couple hours. :) As a fun note, I tried it. Not as strong as the ones in Taipei. Still good.
Sorry, was on flight. Hope the answer does not shock anyone... this street snack is an acquired taste --an edible fungus of furry variety infected tofu, colloquially known as "smelly tofu". Additional strong smell, taste similar tofu. After deep fried, has a nice crunchy skin. Goes well with some chilly/soya-bean sauce. Not for everyone. Long time "Asian hands" gets used to this.
Thanks for all your comments, guys.