In general, there is always the possibility of being injured, but my arguments for it anyway are.

If I plan on rolling through with another car I always try to either lead them... stay well withing their view from the front, or tail them so I can easily stop if they don't happen to use a turn signal or if they do I can see it just fine. This particular road, which is pretty much the only place in seattle I do this regularly, is an official cycling route meaning I technically have a narrow bikers lane on the right side of the road giving me some theoretical protection in that I have a legal right to ride next to a car if I choose to and if the fucker can't use his turn signal and hits me the fucker gets slapped with a couple of tickets and I have other recourse for damages as well.

If I'm just being dumb, which I try not to as I don't really like being hit by a car. It would be tough for a car to accelerate enough going around a corner from a stop to hit me hard enough to injure me badly.

There are a lot of what ifs when doing pretty much anything, so I generally hate what if questions. Seriously, if riding through looks sketchy I won't do it but instead wait for my turn...