Just so you know, this has been field tested but only once. I just started with it but it got a great reaction when I did it. Anyway, there's a way to fix disposable lighters so that they shoot a plume of fire at least half a foot high. It definitely gets people's attention and is a great conversation starter. To do it first make sure you get a disposable lighter that allows you to adjust the height of the flame. Much like this:
Note the piece of plastic hanging off the top right corner. I'm sure most of you know what I'm talking about but I'm just clarifying for those who may not know.
Next step is to dislodge the plastic covering around the gas dispenser.
Now you should be able to see the "guts" of the lighter. One thing you should notice is that there's a white plastic disk that is covered by the adjuster. This disk is what regulates the amount of gas that the lighter puts out. Now you need to push the adjuster up and over the disk so that you can move the adjuster without rotating the disk. It should look kinda like this:
Notice how the adjuster is at an angle. Then you move the adjuster to the left-most side of the disk and push it down so it locks into the disk. Then you move the adjuster to the right as if you were normally turning up how much gas it puts out. Then you push the adjuster up again and move it left, lock it in, and move it right.
The disk is built to let gas flow freely but regularly you can't move the adjuster past a certain point. This bypasses that and allow you to completely disregard any regulation on the gas flow.
You only have to move the disk around a couple times for it to work. You can do it as much as you want but you won't see as dramatic an increase in flame size.
And voila! Insta-torch. Plus it makes a really cool whoosh noise like a butane torch does which makes it all very dramatic.
I hope this all made sense as to how to make it work. If you have any questions feel free to ask. And remember, fire is dangerous. I definitely recommend keeping track of which lighters you've messed with. Twice I've grabbed the wrong lighter and singed my hair. Not a good look lol.