> When you hear hoofbeats behind you, don't expect to see a zebra. Unless you're in parts of Africa, in which case you might well see a zebra. Apparently in So

> When you hear hoofbeats behind you, don't expect to see a zebra. Unless you're in parts of Africa, in which case you might well see a zebra. Apparently in South Africa medical students are told that when you see a small bird on a branch, think sparrow rather than canary. Same principle, different animals!