Why is that not always possible in times of climate change? If you only install a small plastic bag with compressed air, you can generate the bang by briefly applying pressure.
If you hang small LED nets you could watch a cool light effect show while sinking, these effects would not be possible with conventional New Years Eve bodies. Very important reusable. 100 percent eco. There is also rapeseed oil filament for 3D printer, (eco plastic) eco ??? Minix for light show programming ??? Cool as a small kit ???