LONDON - Anish Kapoor is certainly making a mess of the Royal Academy of Arts in London. Every 20 minutes, a cannon goes off in one gallery and shoots a projectile of red wax into a second space. What’s more, this brilliantly colored detritus looks beautiful. The Turner exhibition at Tate Britain may have more art-historical meat, but for sheer blow-your-mind, blast-off- your-footwear spectacle this is the exhibition of the autumn.