Chi Vespa mangia la mele. That's Vespa's 1970s ad slogan, which means, "Those who ride Vespa eat the apple." Trust me: Its connotations are every bit as juicy as the forbidden fruit to which it alludes. During my week-long fling with the biggest, fastest Vespa ever, I zipped around Southern Californian Meccas of style and privilege, enjoying its smooth-running 278cc engine. I'd lane-split at stoplights, confident in its ability to out-accelerate the behemoth SUVs snorting behind me. This super-scooter even holds its own on the freeway with a top speed around 80 mph, but it's pretty much at the top of its powerband. So be careful-you can't just juice it out of sticky situations.