May 23 (GMM) Wednesday was a costly day in Monaco for Mercedes.

According to Swiss newspaper Blick's veteran F1 correspondent Roger Benoit, Lewis Hamilton lost his temper with a boatload of photographers whilst jet-skiing in the Monaco harbour.

The report said Hamilton performed an extra-tight turn in front of the photographers, deliberately soaking their photo and TV cameras and mobile phones with a wave of seawater.

"An expensive prank," said Benoit.

"Hamilton's team Mercedes apologised and paid for the $150,000 (!) in damage."

Later, Hamilton spoke to reporters in the Monaco paddock for his usual media duties with his pet Roscoe - a bulldog - snoring loudly on his lap.