would you leap off this for fun..

I wouldn't although more than a fair few do each year for charity or bravado. Its Mappleton Bridge near Ashbourne and every New Years day people willingly get on a ladder and jump from the top into the icy water below. Now what I hadn't realised is the the top of the bridge is about 6ft from road to parapet top. I couldn't get an angle that really shows it but believe me, that drop is a palm sweating, scrotum scrunching, vertigo inducing nightmare ;-)

a link here show a bit more about it.