This happens when you throw solid sodium into a river

Chemistry its the only science which gets closer to magic, so many researchers on past have discovered so many things like from medicines to bombs, on past medicine was created with plants and other things, but time changes everything, instead of ketchup used for diarrhea changed to loperam for this sickness treat, this reaction happens when sodium makes contact with water, releasing nitrogen gases, making this explosion happen, but instead of boring you with  chemistry class, if you want to try this experiment, do it, but beware where you do it.