Unusual but true: 20 instruments packed into one piano

In unusual but true stories this week, we have a slacklining stunt between 4 slacklines, a smart mattress adjusting temperature automatically, fried air served in an Italy's restaurant, 20 instruments packed into one piano, and the world's biggest camper from LEGO bricks.

All the odd and interesting anecdotes from around the world are here in our review.

Slacklining stunt between 4 slacklines

Footage has emerged of a daredevil performing an audacious slackline stunt above a Swiss lake in the first time ever the brand-new trick has been caught on camera. Samuel Volery can be seen spinning around 900 meters above ground with properties looking like little dots in the far distance as he completes the DaVinci line in the town of Arvenbuel, in the Alps above the Walensee lake.

His workout in the air, named due to its shape, as it involves spreading the arms and legs between four lines and spinning, was captured by photographer Tobias Rodenkirch.