We guess if you've never seen one of these yokes before you might be a bit bemused.

Redditor Mr_honesty_ posted this photo to the Ireland subreddit asking for a little guidance on the strange item he found in his first ever can of Guinness.

"Hello, yesterday night I had my first Guinness! But this ball was inside it, I cut it out. Can someone explain this?"

Pic via Reddit

Aw…

Fellow users kindly explained that although it may look like a ping pong ball, the widget was actually put there on purpose.

He was grateful for the help and also discovered that he had made a bigger mistake - drinking it straight from the can (the horror).

"Oh.. I drank it straight from the can and it didn't taste good... And this for being a waiter and a bartender is kinda stupid that I didn't do it".

*shakes head*

Here's hoping his next Guinness is a less traumatic experience.