With thanks to:
Con Kennedy: Who GoPro recorded the Bloomsday run and uploaded to YouTube. And provides technical help on a wide range of subjects.
Liam Sharkey: For suggestions on the Pprrpffrrppffff Blogpost
Paul Sweeney: Who ran the first half maration run on Bloomsday, having run a full marathon two days previously. He was also my running companion on the Dubliners 21k.