Unusual but true: Swiss hotel lets guests ski down its roof

In stories this week, we have world’s first fan-built Optimus prime, largest gathering of people dressed as mermaids, Swiss hotel with zigzagging ski slope, world’s biggest soccer sticker collection, and robotic kitchen restaurant in Boston. All the interesting, red-hot and downright odd anecdotes from around the world are in our news review.

World's first fan-built Optimus Prime

A dedicated father with no mechanical training has manufactured the world's first fan-built Optimus Prime truck.

Back in the summer of 2016, 36-year-old Joe Fiduccia worked day and night recreating the giant full-size replica that weighs around 21,000 pounds (9.5 tons).

Optimus Prime is one of the most renowned characters to hit the screens from the successful Transformers series.

Joe from Pennsylvania managed to produce this replica in order to inspire his 10-year-old son that anything is possible.

With the help of around 25 people, including a few close friends and external parties, Joe worked tirelessly to complete the job.