Why is it extremely dangerous to put tins of food into a fire or heat them without opening the tin first?

When a tin can is heated, the gases inside the can expand. Pressure increases, and the tin can rupture or even explode. The metal can and its contents can rocket out at high speeds, presenting a severe risk of injury.

The contents of the can can reach extremely high temperatures, potentially causing severe burns if they come into contact with skin. Additionally, toxic fumes may be released, which can cause respiratory problems or even death if inhaled.

Therefore, it is crucial never to put tins of food into a fire or heat them without first opening the can.