[BenLurkin]

Details at this link:
http://www.delawareonline.com/story/news/local/2016/11/06/injury-punkin-chunkin-sends-one-hospital/93394698/

[justlurking]

Thanks for the link. That confirms it was an air cannon that malfunctioned.

[Robert DeLong]

A man and woman were injured Sunday after an explosion at Punkin Chunkin Sunday, according to Delaware State Police, who previously reported a person had died.

The two were hurt when an air cannon went off, sending with it large pieces of material from the cannon. As people were running away from the cannon, a large piece of the cannon hit a person in the head.