He flew in to the glass door and sat there on the ground too stunned to move.
after being picked up and checked for injuries he was carefully placed on the ground and managed to rouse himself to fly in to a tree
Blue jays are known for being VERY outgoing birds. This one is trying to take over the tree the mockingbirds have claimed, so he must be very confident and brave.
He finally came to his senses and seems fine. He will live to fight another day!
There is more to a blue jay than any other creature. He has got more moods, and more different kinds of feelings than any other creature; and mind you, whatever a blue jay feels he can put in to language.
Mark Twain's "A Tramp Abroad", Chapter 3 "Baker,s Blue-Jay Yarn".