Originally Posted by Van Rijn

Well, among other things there's confusion between temperature and heat. For instance, one comment was "Collisions in the LHC will generate temperatures more than 100 000 times hotter than the heart of the Sun."

Referring to temperature is a way of talking about particle energy. That is very different than talking about the heat of a system. In this case, what's being discussed is the energy of the particles, and as discussed, these energies already occur in nature, on Earth.