bogglingly

It was bogglingly complex, with 212 speaking parts, more than 1000 camera setups, 95 scenes, 15 separate film stocks, and endless intercuts and flashbacks -- "everything but footnotes," Stone joked.

The prisoner rises with a bit of paper in his hand, and slowly and bogglingly reads from it what has been written down for him to say, and what is delivered thus, reads to the public in the newspaper report like shrewd spontaneous suggestions.