jimc wrote:
Nearly ouch!
Two tips, always ride behind a vehicle so you can see the driver's head in his side mirrors - this way he should be aware of your presence and you are clear of his rear. Also always leave at least a bike's length or more between you and the vehicle in front - this leaves an option of two escape routes if danger should appear from behind or the vehicle starts rolling back. It means you can see any road imperfections ahead as well.
Either of the above would have ensured you wouldn't have been in any danger from the 2x4 above.
+1 - I thought I was going to have to use the inside turn lane for a minute last night - didn't think the truck coming up behind me was going to stop. Wouldn't have had that option if I wasn't back my standard bike length.
PS: if possible I always try to have my bike slightly pointed in my expected escape route direction. Makes it easier to jump and fly away.