Get a pair of goggles and put them on!

Wipe your geyser tube with a dry napkin until its clean.

Go into your designated area. Make sure that you have something that marks all of the height.

Put your five mint mentos into the opening of the geyser tube.

Unscrew your diet coke bottle.

Insert your geyser tube gently in the bottle. Use the adapter intended for the size of your bottle.

Screw the cuff until it feels snug against the bottle. Make sure you screw it all the way down so diet coke doesn't spew out the side.

Now tell someone/your partner to start recording the experiment. Make sure that they angle it just right, so you can make sure that you get accurate results.

Now step away and gently pull the string.

After the geyser has finished erupting, instruct the person to stop recording.

For cleanup, take out the geyser tube.

Throw out the diet coke.

Throw away the diet coke bottle.

Clean the geyser tube.

Wash and put away.(keep track of this and the string)