"Hello? Hello? Hello? Let me out", Bradley called from the grave.
At his funeral, his friends and family wore black and stood around Bradley's grave, but then the unexpected happened.
This video was also shared by the Irish Defense Forces veterans' news as part of an explanation about the difference between military humour and civilian humour. His family called him a prankster. Mr Bradley can be heard saying as he appears to knock on the coffin walls. Let me out. I can hear you! Is that that priest I can hear?
The video ends with Bradley's rendition of Neil Diamond's "Hello Again".
Kiernan said: "It just made me happy, as that was him, so amusing and always making others laugh, he's such a bright character, he would be loving this right now".
Shay Bradley's daughter Andrea and her siblings granted his final wish by playing a recording of his voice coming from his coffin as it was lowered.
"Always the pranksters, ya got them good Poppabear, and gave us all a laugh just when we needed it!" she wrote. "I will love you forever", she captioned the video, along with the hashtag "shayslastlaugh".
Bradley pulled off the prank with his son Jonathan's help.
Shay's grandaughter Chloe Kiernan says that around a year ago he came up with the plan to go out with a laugh.
"What a man, to make us all laugh when we were incredibly sad", Andrea added on Twitter.