I have made lots of bangs with actetylene, and I worked out a very reliable method of filling balloons with the right mixture. Glass jugs would be a very bad idea!Stubbing out a Clean burning acetylene torch to fill a sealed cardboard box will make confetti with a bang. On the other hand a mix which is acetylene rich won't explode clean. you have a higher chance of being correct that me.
The posted image showed an extended burn with lots of yellow flames. The only way that happens with any gaseous fuel is if the fuel was not pre-mixed with oxygen. Dirty burns with acetylene are very smoky and throw smoky cinders into the air. If enough Oxygen to avoid the smoky burn? As previously stated, it's more like an explosion.
Here is a video of pure acetylene generated into a balloon. Notice the cloud of black smoke.
Here is one made with a much better O2 mixture. "Hold my beer and watch this!"