Instant regret? Man eats a squid ink sac, staining his lips and teeth black

We've all had the experience of eating spicy or pungent food, like garlic, that lets others know what you've had for lunch or dinner the night before.

So imagine the explaining this man in central Vietnam had to do after he was filmed trying out an unusual delicacy.

The hungry diner was filmed chowing down on a squid ink sac that stained his mouth and lips black.

Squid ink sacs are popular in South East Asia, but there is one very big drawback - they stain your teeth and mouth - sometimes for days.