When driving, what has been the weirdest object you’ve swerved to avoid hitting or running over?

A chair that flew out of a pickup truck in front of me.

A briefcase.  When I told my husband he fussed that I didn't stop and get it.  It could have been full of cash! 

Probably the weirdest is a plastic or paper bag. I avoid hitting anything whatsoever because I'm never 100% sure it's not either A) something living or B) something that could harm my car in some way. 

I've also tried to avoid hitting butterflies, or having them hit me. Easier said than done. :( 

A mob of wallabies. I stopped completely. Did the same for a disoriented koala that was crossing a freeway.