"We are interested in stopping practices that endanger public health and comply with rules and regulations," said Oshiro.

The fruit stands that sell whole fruits and vegetables don't need health department permits.

"It crosses the line when people, they process the fruit they are selling.  If they are cutting it, having it ready to eat it, or if they are cooking it or processing it into jams and jellies, then they are going to need a permit," said Oshiro.

Our cameras stopped at one popular North Shore stand.  Health officials asked to see if their permit was in order.

"Do you know where they cut the fruits?" asked Oshiro.  The workers told us they were cut in the lunch wagon.

But, just minutes before, a complaint about a vendor cutting fruit using a dirty knife and cutting board triggered a visit by a food inspector who confirmed the unsanitary practice.

"What struck me was the amount of flies.  There were like 20 flies on the cutting board and the fruit," said DOH Sanitation Inspector Mike Okamura.  "And the person was not doing anything to chase them away.  He was cutting fruit and bagging the fruit."

Unsuspecting visitors and residents would probably rather not be surprised by getting more than just a refreshing treat when they pull over.

"It's one of those thing you have to be careful of not matter where you go," said visitor Peter B.

You would hate to think that "killer mango" means anything more than good eats.