Ezekiel Goldthwait was born on 28 Mar 1767 and admitted to the South Latin School in Boston in 1779. Entrance at the age of twelve was late for a boy; scholars usually started at the Latin School at seven. But the war might have disrupted Ezekiel's schooling, and he might have been studying elsewhere.
Young Ezekiel didn't last long at Boston Latin, however. The town's public schools had sessions every day but Sunday, but on Thursdays and Saturdays the masters dismissed the boys in mid-morning. One Saturday young Ezekiel used his free time to buy fireworks "at a place called the Laboratory, where squibs were sold to the boys," according to Henry F. Jenks's Catalogue of the Boston Latin School, published in 1886. "Laboratory" was the period term for where artillerists assembled their explosive shells and gunpowder cartridges. There was a Continental Army Laboratory at Springfield, Massachusetts, during the Revolutionary War, which eventually grew into the Springfield Armory.
Back to Ezekiel buying his fireworks:
He procured some and put them in his pocket, where they exploded and burned him so badly, that he died after several weeks of intense suffering.See another cautionary tale from the 19th century at City Record and Boston News-Journal. Let's be careful out there.