Yup. Chemical reaction to create hydrogen and had it fill a balloon over lunch. One of the other students got to explode it with a match taped to a meter stic

Yup. Chemical reaction to create hydrogen and had it fill a balloon over lunch. One of the other students got to explode it with a match taped to a meter stick. I could feel the air rushing by when it exploded. It was also quite loud but no big fire ball or anything.