Posting pictures of their frivolous antics on Facebook has made paramedics in the UK the target of severe criticism.
The pictures included the NHS emergency staff and 999 operators sleeping at desks, fooling with vacuum cleaners and pulling funny faces.
One snap showed a line of the South East Coast Ambulance Trust staff in chairs doing a "conga".
The joke photos at the Trust's HQ in Banstead, Surrey, can be seen publicly on the website.
"Of course they're entitled to have fun if they're not on duty," the Sun quoted an NHS worker as saying.
But the group was criticised for letting the images online, and a Trust spokesman said staff would be reminded about "appropriate use" of social websites.