There is no reason to fear clipless pedals. I remember thinking I'd fall over a million times, but guess what, I never did. I got in and out the first time and never fell. Of course it could still happen- sometimes pedals jam and you fall over. It probably even happens to Lance Armstrong. Somehow i've avoided that so far, go figure. And if you do fall over, so what/ It's not like you'll break anything- it's no worse than falling on the ice.