There comes a time when you just have to hold your hands up and admit that some teachers are just absolute heroes.
Well, none are more so than a nameless professor who apparently "Rickrolled" his students in the best possible way.
The night before an exam, students logged onto file-sharing database Angel for some last minute cramming when one noticed the addition of a file titled 'Final Exam Answer Key'.
Naturally, they clicked and...
For those of you who are unaware – or have never had the misfortune of falling victim to a Rickroll – this term is derived from the act of clicking on something, assuming it to be one thing, and instead being met with the music video to Rick Astley's 1987 track 'Never Going To Give You Up'.
Also, you'll never believe this.
HT Toasty Jones