Step 1: What You'll Need:
All you will need is a sink with a sprayer and tape.
Step 2: Get Out Your Tape
Once you I have your tape out, grab one piece.
Step 3: Tapping
Apply tape on the button sprayer
Step 4: Done.
Now that your tape is on your faucet's water will automatically come through the sprayer. When the person who you're pranking turns on the sink they will get a water cannon shower. Have fun.