off the scale
(idiomatic) Far in excess of what is normal or measurable.
The excitement is growing so much I think the Geiger counter of Olympo-mania is going to go zoink off the scale. Boris Johnson
Voice-acting, on the fun meter, is off the scale. You show up, you don't have to be all primped up, or dressed up. And you get to work with some amazing people, and goof off for four hours. Jason Marsden