No, not climbing a bridge - bridging up to the fast group after getting left behind for one reason or another- but the point is the same - a short period of time where I need extra power.

I'm sure that you're right - some kind of interval training is important to enhance available short-term power. In fact, I rarely have the discipline to do real intervals - my training of this sort comes more from hammering up hills or informal sprint/regroup events on group rides. Particularly as I have not been climbing hills recently, I have done intervals on some of my solo rides - I usually do either 1 minute or 2 minute intervals - but short bursts in a very hard gear sound like they would be very effective, too.

But back to the topic of pedaling form, I really feel that I'm getting somewhere. For sure, i have a long way to go, but the progress feels good.