Cringe your way through the Bad Grandpa trailer

Hold on to your bus pass... the 'Bad Grandpa' trailer has arrived.

Now we'll be brutally honest. This didn't sound great on paper...

Although pretty funny as a one-off character in the 'Jackass' movies, could Johnny Knoxville's loathsome, boozy octogenarian really be spun out into a whole movie?

[Knoxville to unleash Jackass spin-off Bad Grandpa]

Well, by this evidence, it's damned crazy... but it just might work.

Mixing real narrative in with some eye-wateringly painful/embarrassing stunts involving the unsuspecting general public, it sees Irving Zisman (Knoxville) transporting his eight-year-old grandson Billy across the US to be with his father.

But, as you'd expect, there are some horrifically awkward situations along the way, involving shoplifting, a corpse, a wedding cake disaster and a large penguin.

[Knoxville positive about Jackass 4]

And we guarantee you'll be watching through your fingers at the beauty pageant, perhaps some of the most inappropriate scenes you'll see this year.

'Jackass presents: Bad Grandpa' is due out on October 25.

God help us all...