Don't let your mind make excuses about how something can never happen. Reality is the true judge of what's possible.
How do you *know* you can't do it? What's your evidence? Have you actually *tried* to do it? How can you say a thing isn't possible if you've never tried?
What are the consequences to failure? None? Being uncomfortable? Embarrassment? Those are temporary, inconsequential. If failure cannot permanently injure you, why not try?