Ah, Tagadas. No restraints, spinning and bouncing - what could go wrong? A lot of travelling ones (certainly in Europe if not the UK) let people stand up during the ride and they'd bounce it around a bit several accidents later the HSE clamped down on them a little and now in the UK the bouncing motion has to be limited or other steps taken to reduce the chance of someone being injured.
Basically, to be allowed to operate in the UK, a Tagada would not be allowed to be physically capable of doing what the one in that video does unless it had somehow been fitted with restraints.