Mystery object is 'fascinating', but I can't work it out. Can you help?

 

‘Guess this one!’ challenges Paul Larsen, Aussie speedster extraordinaire. ‘All the clues are right there in the shot. The answer is pretty fascinating.’

Mmmm, looks technical and my guess is it’s nothing to do with equestrianism. Paul says: ‘Write down what you see in the picture and think about it. I could hardly believe what I saw. J Class? Pppphhhh!’

I’m flummoxed, me. Do you know what it is yet?

Do please email me your suggestions by clicking on the ‘Comment on my blog’ link underneath.