Firecrackers work if you do it right. People ignore not to use a PB like Jiffy that have low trans fat, and think it will work anyways. Most of the time, it doesn't work for them for that exact reason.

Firecrackers work if you use organic PB with a high % of fat in it, and if you heat up the oven hot enough (120degC-170degC) and cook for about 20 minutes, it will work.