Here's a bike race scenario you may have experienced:
You're climbing in a pack, and the person in front of you stands up, shoving their bike back about two feet. You hold your breath as you see the rear wheel charge towards you. Rubbing commences, a sickening sound. You might even smell smoke, and eat asphalt.
I heard this happened to a certain someone over the weekend. I can't say it hasn't happened to me. In fact, I think nearly everyone has experienced this terror at one time or another.
Here are a few thoughts on the matter, just to get it out there...
If you're the stander-upper offender:
Uh oh, you just stood up and you hear the sickening rubbing sound of tire on tire. Most likely, you can tell what side the rubbing is coming from, so move in the opposite direction a few inches. That will really help the other person stay up, and since you just slammed your bike into them, it's the least you could do.
If you're the stander-upper victim:
It's easier said than done, but don't freak out. If you tense up your shoulders and arms, you're probably going down. It is possible to stay upright when this happens. The most effective method I've found is to lean a little towards the wheel you're rubbing, and push the bike away from you, keeping it as upright as possible. If you're in the drops, you're chances of staying up are as good as they can be. Hoods...not so much. And if you're riding in the tops...in a group...have a nice fall.
Prevention:
Yeah this is preventable. First of all, when you stand up, don't do it all loosy goosey. Maintain your cadence (shift one harder gear if you need to), and keep your balance back towards the saddle as you stand. Don't just lurch forward with one ugly, feeble movement. Slowly ease your weight forward to your normal standing/climbing position. This is good pack riding etiquette, but I guess a lot of people don't know or care.
And if you're following someone, you have to be ready for it. Don't ride directly behind their wheel. Ride maybe 6-12 inches to one side or the other. If the wheel comes back, you'll be fine.
Riding in the drops when you're in a tight pack is a great idea. You'll be able to stay in control easier if someone bumps you, or comes across into your wheel. The hoods and tops are great when you're on your own, but if you want to stay upright, consider racing in the drops.
So now that racing season is approaching, you'll need to transition into racing in a pack. Contact is bound to happen as people get tired and everyone rides aggressively, but that doesn't mean you have to crash. If things get hairy, get in the drops and be ready. And relax!