Do clipless pedals make that much of a difference?

[Owlie]

How would I lose my pedals?

I've gone down some hills at 28.5 mph since I got my bike. That's the fastest I've got up to. It was scary because I kept thinking about the crash stories that have been on here.

I will be bunny hopping?

Does using the clipless pedals make you much faster right away? What muscles end up getting worked out?

Well, it's more likely your foot falls off the pedals. I'm thinking of going clipless for that reason. Scary. I imagine it would be nice trying to get started at stop signs and lights and stuff too (makes up for the unclipping, I guess).