Medics On Scene said on Facebook yesterday morning the concert went really well for them until someone decided to steal the bright orange, seven-foot stretcher.
"This bit of equipment is vital for our patient retrieval," they wrote.
"Someone must have seen if being taken. It's 7 feet long and bright orange! It can't fit in a pocket.
"Please help us get this back. Our Medical Director's details are on it with an address for its return."
Even the concerts headline act got involved and made a public appeal, writing someone "crossed a line" on the event's Facebook page.
"Hey a bit of fun is all good but someone has nicked this from the medics at the gig yesterday and crossed a line. Not cool."