Dropping a red-hot bolt in liquid nitrogen!

The video captures an experiment involving a camera and infrared setup, where participants observe and react to unexpected melting and bubbling of materials. The experiment is recorded in 3D, and participants express surprise and excitement at the results, noting the fun and unexpected nature of the reactions. The video concludes with reflections on the experiment's outcomes.

What did the speaker mean by 'this should be cool' in the context of the experiment?

What was the reaction of the speaker when the material melted through the plastic?