They swore they would never do it again but one year on and Jase and PJ are attempting yet another on-air marathon - and this one is even longer!
Last year, they smashed out an impressive 52 hours with no sleep, and today they begin a new attempt - to broadcast 53 hours live on-air.
The pair kicked off the insane challenge at 1pm today and will stay on-air until 6pm Friday, without stopping for so much as a wink of sleep.
Poor things! Weird antics are bound to occur when no sleeping is involved.
Last year PJ suffered ‘out-of-body’ experiences and mistook balloons for human beings, while the ZM crew admitted Jase "scared them a little bit" during the experiment.
You can watch it all unravel – catch all the highlights (and lowlights) on the LIVE stream here.