How to describe the seemingly indescribable wonder and artistry of Cirque du Soleil's latest and most dazzling display? An Esther Williams-Busby Berkeley spectacular on peyote? A Salvador Dalí painting come to life? A stage show by Fellini? The French troupe has topped itself with this production -- and not simply because it's situated its breathtaking acrobatics in, on, around, and above a 1.5-million-gallon pool (eau -- pronounced O -- is French for "water"). Even without those impossible feats, this might be worth the price just to see the presentation, a constantly shifting dreamscape tableau that's a marvel of imagination and staging. If you've seen Mystère at Treasure Island or other Cirque productions, you'll be amazed that they've once again raised the bar to new heights without losing any of the humor or stylistic trademarks, including the sensuous music. If you've never seen a Cirque show, prepare to have your brain turned inside out. We know -- those ticket prices -- ouch. We want to say that we can guarantee it's worth it, but that's a decision only you can make. (Though no one we've personally sent has come back regretting that they went.) But we can say this: Watch this show, and you know where a good chunk of the money is going (in other words, they spend a bundle nightly to mount this thing). Note that no tank tops, shorts, or sneakers are allowed.