We have all heard of the expression “going down like a lead balloon”, have we not?
Well, some students at the University of Bristol have managed to make a lead balloon fly. Is nothing sacred?????
http://www.bristol.ac.uk/news/2015/may/lead-balloon.html
The Lead Balloon.
Boadicea's Chariot 
I read that a flying pig was downed by a cowboy too! Is this the silly season or wot? š±
Oh yes it was! A tree saved the pilot’s bacon. š