Matthew Weathers, a maths and computer science teacher at Biola University in La Mirada, California, is quite the prankster. He went big for this year's April Fools' Day, with a digital act that got everyone in his class laughing.

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The creative prank starts when Weathers seems to have trouble erasing a blotch off his projector. He then opens a video on the same screen, trying to find ways to remove the stain – only the character in the video offering advice is none other than himself. The digital and live-action Weathers start interacting with each other, to the delight of his students — and the 1.7 million people who have seen the video on YouTube so far.

Weathers tries everything to erase the stain, including using — without much success — a cat. The plot culminates when video Weathers hands real-life Weathers a lightsaber. The prankster and his amazing video editing skills are then greeted by well-deserved applause.

Weathers has even been hailed "the best maths teacher ever" since on Twitter and YouTube.

Weathers is no stranger to April Fools' pranks. Last year, he had to chase after "internet connectivity error" messages while his video character was angrily mocking him. His 2015 video reached more than 10 million views in less than 24 hours and counts more than 15 million today.