[James E. Talmage]
Talmage delivers a dramatic chemistry lecture/demonstration to his students at Brigham Young Academy where a controlled explosion bursts every lamp in the room and causes a few minor injuries, including to one young girl who was struck in the forehead with a shard of glass.
In his journal Talmage writes:
When she discovered traces of blood, she fainted very nicely, and I changed at once my occupation from that of a public lecturer to an attendant physician. She recovered, however, when 'twas found that the large amounts of blood filling the bowl from which I was bathing her head came from my own hand. Two pieces of glass had struck the index finger of my right hand, one fragment burying itself in the knuckle joint.
[MSS 229, Journal, Chronology of the Life and Work of James E. Talmage, J. Trevor Antley, https://docs.google.com/document/d/1MJsHY83JZL_n6CjWq11y1trT_CVXMMXAx2uYOWAwn0c/edit#heading=h.2zfdaoa]