One person was not freed until more than six hours after the collapse. Jenny Callaway, a student who was on the stack, said it just fell. She said there was no warning. It's sad, it's tough. Thousands of logs are stacked high to build the bonfire, using cranes, tractors and crews of students.
Students involved in the project get safety training in advance.
In 1994, a stack collapsed and a second was built and set on fire. The BBC is not responsible for the content of external internet sites.