I was walking in the woods behind my house yesterday. It had rained in the morning but was pretty dry when I went out. I put my hand up to a large pine tree (without touching it) and to my surprise, it "spit" something out at me. It looked like lots of small bubbles. I repeated this with a stick (moving it close to the tree) and the same thing happened. Lots of tiny bubble-looking things.
Do you have any idea what this could have been?