The circuses of today feature less slapstick and more spectacle (think: Cirque), taking audiences from peanut-strewn mall parking lots to cushy Vegas theatres. But this weekend’s Toronto International Circus Festival, which kicks off Harbourfront Centre’s annual roster of awesome summer fun, is the best of both worlds: accessible (it’s free) and theatrical. Fire eaters, aerial artists, hybrid Parkour/martial art/hip hop stunt men, and a couple of those dudes who ride around on tiny motorcycles......