Coasting unicycle

I’m still new to unicycling (I’ve been riding for about four months), and I had an idea the other day. I had taken my uni to the local skate park to see if I could manage a halfpipe. It didn’t take me long to realize I can’t pedal fast enough. That’s when I thought it would be neat to have a unicycle that could coast (like a bicycle’s freewheel). My question is ‘Am I the only one that thinks this would be worthwhile?’ If anyone does think it would be cool would it be better to have the control for the coasting by the seat like a brake or on the end of the hub like the new geared uni?