@Chemist
Funny, I understood what that wiki article is saying, and, ironically, this is because of my training as a chemist.
I think maybe a better comparison would be to say the temperature of an object cannot fall below absolute zero by passing though zero, principally because Heisenberg's uncertainty principle prevents anything from ever being at absolute zero.
To get to a temperature below absolute zero, a system has to have an upper bounded temperature, i.e. be a properly closed system with a finite number of states, when energy is pumped into such a system at the maximum temperature which is an asymptote, an inversion occurs, and the temperature becomes the minimum temperature of teh system, which is the negative of the abosulte maximum. This doesn't apply to everyday classical objects, but only to specific things, such as the energy states in the atoms comprising a laser, and similar quantum objects.
The speed of light is a similar system, as an object approaces the speed of light, its mass approaches infinity. it is not possible to be at the speed of light, as the mass, and therefore energy would be infinite, but it may be possible to be beyond the speed of light, in which case the object in question would have to have negative mass/energy. In fact theoretical particles travelling at beyond the speed of light would have a lower limit for their speed of c and negative mass. We are essentially cut off from such theoretical particles, since they cannot slow down beyond the speed of light, and we cannot speed up past that point; the problem being the point in time at which the velocity is at c.
Biting the hand that feeds IT
