If you were to put a pan in the oven, it would likely depend on the type of pan as to what would happen. For example, if you put an aluminum pan in the oven, it would start to heat up and change color. If you left it in long enough, it could potentially catch on fire. If you put a glass pan in the oven, it would also start to heat up but wouldn't change color. However, if you left it in for too long, it could break. So overall, it really depends on the type of pan as to what would happen if you were to put it in the oven.