Usually when your mobile device overheats it automatically shuts down. Apparently this was not the case for a man in Finland who claims that his iPhone 4s caught fire in his pocket. Here is the security footage of the incident as posted on Mashable:
The footage doesn’t actually show that the device is an iPhone 4 S. If it is actually an iPhone, the phone must have malfunctioned. Either way this is pretty scary, and reminds us of the importance of in-the-wild testing.