"I've been in the job for 17 years and I've never been to a job where there's been an 8m high inflatable clown across the road."
The sadder-looking and much smaller clown was now back in its cage on the other side of the fence, he said.
Weber Bros director Harry Weber said the giant inflatable, affectionately dubbed Bruno, would be inspected for damage before any attempts were made to reinflate him.
"I believe he's on the other side of the fence and the gentlemen that's in charge of him, the one that ties him up, is on his way there to just have a look and see what happened," said Weber.
The giant clown - one of 30 - had been fastened securely with special pegs and tied to a fence.
Weber also revealed where the zip to deflate the clown was: "Near his buttocks - so when they let the air out they would have smelled something funny I think."
He said it was the first time one had become airborne.
If there was no obvious damage Bruno would be back up on his perch beside the road this afternoon.