A RED BALLOON

Yesterday I was at the Blue Route Mall, driving slowly along the road behind the building which leads to the undercover parking. All at once, in front of me, was a big red balloon bowling along the road in the most extraordinary way. It was as if it had a life of its own. It would bounce a few times, roll a little and then leap up into the air (waist high or more). Coming back to earth, it would continue on its way: bounce, bounce, bounce, roll, leap, roll, bounce, bounce.  I have never seen anything like it. As it came to a corner, I saw there was a lorry blocking the way. The lorry was trying to back into a driveway and was half way across the road. I had to stop and I expected the balloon to be brought to a standstill too. But no. As though on purpose, it veered to the right and passing the lorry, carried on along the road out of sight. A few seconds later, the road was clear and I was able to continue. I looked for the balloon, but there was no round, red object to be seen, only a starling, flying up in front of my car, flashed its scarlet wings at me. It was as though the balloon had changed into a bird? Did this really happen or was it a hallucination?