We call those guys "the big dawgs". When you ride with them on a century ride, they wait until you are in the bathroom line at the rest stop and take off so you have NO chance of catching up!

Even tho we advertise our club rides as "no drop rides", I've seen this happen on those rides as well. They will wait, but when you arrive 5 or so minutes later, they're ready to take off again and, once more, you are left in the dust.

I often ride solo for this reason. I can pace myself according to my strengths which makes my ride much more enjoyable.