This semi-autobiographical movie about paraplegics carries its weight of authority lightly.

NEWYORKER: The Waterdance

Moreover, it is not uncommon for certificates to be issued by self-proclaimed experts or painting restorers who have no real authority or scholarship about the artist, and whose guarantees carry no real weight in the actual market.

FORBES: This Man Could Save You Millions - Or Help Discover Them.

The report published on Tuesday - part-funded by the UK's Civil Aviation Authority (CAA) - looked more at changes in the average weight and height of passengers in the past few decades than the highly-publicised fears over so-called "traveller's thrombosis".

BBC: Civil Aviation Authority report