This is something that imo takes the most practice.Unless you do 100's of them to actually know right what to expect,there will always be a guessing game on if they turn out. even with a digital and viewing the image after the shot in LCD it is hard to tell if you nailed it.That plus you do not get a second chance of the same thing happening again.I wold make saturation adjustments if it was mine,because I am not fond of the orange that low light shots produce. The second one you sure nailed the flame right....and is unfortunate about the missing top.The first one is brilliant as you got the flames and those lighter ones under the main flame.That is excellent to look at. Crop the sides a bit and it is the winner.

"The happiness of a man in this life does not consist in the absence but in the mastery of his passions."