The substance the teacher uses in the video is liquid methane. But methane has a really low boiling point. Like, about −160 °C low. So once it touches the comparatively hot floor, the Leidenfrost effect comes into play, and it slides across the floor. The issue is though, methane is colorless, so you can’t normally see it. Thankfully (in this demonstration), methane is also very flammable, so he sets it on fire before dumping it onto the floor so you can see it as it moves.
Definitely a cooler demonstration of the Leidenfrost effect than dropping a little water in a hot pan.
The researchers used
high-speed photography and an instrument called a Rheometer to analyze frog saliva under prey-capturing
conditions. The scientists think frog tongues could one day
help engineers design reversible soft adhesives that could work at high speeds.
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