I'll give you a story:

I went on a ride with an "intermediate" group that turned out to be newbies with no pack skills. So we come to a left turn at stoplight, and I'm 3rd in line. Light turns green (Yield on green) and the ride leader clips in and moves out. Then she notices a car up that would have prevent the whole pack from making it all in one go, so she stops 5 ft after she started. I'm on the right side of the lane, with traffic passing us on the right.

SHE F-ING STOPS, as I'm half clipped in! For those of you that have fallen over, you know the feeling when you're about to succumb to gravity. I had to stop when I was thinking we're going, and I nearly fell to my right, into traffic, but was able to get my foot out and down in the nick of time. JEEEZUS CHRIST. I can still see the end of my life.

Lesson learned. Be EVER vigilant! Especially in new groups.