This is a tiny slide in the midst of big mountains. The forced perspective here is to make the slide look very large by using the distance compression of a telephoto lens focal length. Guess you had to be there. I didn't have a cute shot for this challenge.
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All of this pulls together to reinforce the size/perspective of everything to me. So... I'm not understanding what you're showing me. I hate it when I don't "get it". *sigh*
I assume the connection we are to make is the slope of the slide against the slope of the mountains? As they are going in different directions this is not working and this slide is so dominant it overpowers any illusion you may be trying to create. Sorry, I wish you well with it.
This is a pretty nice image, one of the better ones in the challenge IMHO. However, I'm not sure I see how you have used "forced" perspective. It looks like a normal perspective to me. Perhaps I am missing something here.