Computer science students thought they'd struck gold when their professor appeared to give them a guide to their final exams - but actually just trolled them with 80s popstar Rick Astley.
The prank was uploaded to Imgur with the title "That Bastard..." with the caption: "My friend's professor uploaded the ‘answer key’ to their final exam..."
When students clicked on the link, they were treated to Astley's hit 'Never Gonna Give You Up' - a common prank on the internet called 'RickRolling'.
Speaking about the RickRolling trend, Astley previously said: “I think it’s just one of those odd things where something gets picked up and people run with it. But that’s what brilliant about the internet.
Here's the video in its full glory.