Cesium is scary

Cesium metal is very similar to sodium or potassium, but it's even more reactive. It's kept in this glass ampule to protect it from air, and having it break open, could be really dangerous.

WARNING: Cesium is extremely reactive and dangerous. The sample was exhibited in a controlled environment. Serious injury can occur if handled improperly.

#shorts ... https://www.youtube.com/watch?v=hL9j6CEnVnc