When I was performing in Vero Beach, a fan invited me over for dinner.  She asked me to sing Florida Rain . She surprised me by bringing out her Thunder Tube. I was enthralled by the authentic, deep rolling rumble and asked my husband to buy me one for my birthday.  When I incorporated the thunder tube into my show, and everyone wanted to buy one.  So here you are!  Other uses:  Sports events to cheer on your team, Attention getter used by teachers, or great for scaring people!