https://en.wikipedia.org/wiki/Elephant’s_toothpaste
https://www.simplyscience.ch/teens-experimente-luft-wasser/articles/elefantenzahnpasta.html
https://www.gif-vif.com/Whoa-run/
https://www.uni-wuerzburg.de/fileadmin/08020000/pdf/erlebnis/elefantenzahnpasta.pdf