I spun my ass off with nut knarlys.
(old pic)
But it might be due to my small 19" front tires. On dirt that is even remotely damp, it would hook HARD. On the hard packed stuff and grass i spun a lot though. Come to think of it, i dont think there's a 20" tire that would hook. And i refuse to go with prowedges for my playbike.