Hypervocal:

“My colleague has a dirty keyboard and has gone to vacation,” writes this Redditor. “I did the only logic[al] thing: I planted cress in his keyboard.”

The included GIF is a bit misleading. You have to go to the full album to see the prankster “cheated” a little bit – he put dirt in the keyboard and watered the garden cress seeds so of course it was going to sprout. Still – you’d like to see the look on the co-worker’s face when he comes back from vacation!