Not disagreeing with @KinkyJ, holding it up where you can take a picture is a pretty bad chance of blinding yourself if it pops. Could be what you're seeing there, the gas is coming out of the narrower hole fast enough that the flame front moves away from the nozzle. That's unstable, though, and the flame front might get sucked right back into the lighter.
Check online, you might find some advice on safer flame front experiments you can do. Enjoy, post pictures!
A fascinating jungle, and a dangerous one. Think face shield -- always, always protect your eyes -- ear protection, long sleeve flannel shirt -- *not* synthetic fabric, ever! and sandbags. Oh, and a friend with a fire extinguisher and a phone to call 911. Have fun doing Science, don't forget to keep a notebook for Posterity.
Wow, pretty. I don't know why. You need someone in the sciences to explain that effect.
Be careful, though, Kinky is right, it could blow up and do some serious harm.
Because it blocked the gas from escaping as designed...
Clear it out or throw it out before it blows up in your face.
because the gas was able to release around the wax even though it is being partially blocked.
That is where the gas was most concentrated, which means that the rest of the gas is expanding beyond it's designated area for which it was designed make it unpredictable and dangerous.
Your welcome! We all form each other :)