when day when i was studying for a test that i wood be taking the next day i got distracted and took wun of my liters from my collection and stated to safely play with it and i notice that thayer was almost no fuel left in the litter so instead of a flam it only make a spark so i had the idea to take a photos of the spark in black and white next to my window it took me about 150 tries to get it purfit but i finally got it