The video soundtrack covers up the *continual honking* that is an intrinsic part of such traffic negotiations...

First of all, the guy does have a physics background (as do I, FYI), so just calling him a "botanist" is quite unfair. Also, his arguments make some sense:

1: the cosmic ray argument doesn't hold up exactly, as in the accelerator two particles of identical but opposite momentum will collide, so that their reaction products (including, possibly, mini black holes) could have very low speed, low enough to be captured by the Earth's gravity, which would be impossible for any black holes created by cosmic rays -- they would just shoot out of the solar system at almost the speed of light.

2: Hawking radiation has not been observed or conclusively demonstrated, so it is just possible that a mini black hole would hang around. It would probably not be very interactive with the local matter at first, so it would fall into the Earth's core and slowly (but with exponentially increasing speed) devour our planet, and possibly the whole solar system. Due to tidal forces the Earth would be a terrible mess if it did in fact emerge in another universe; what happens to matter that falls into black holes is a matter of current debate.

Physicists at the Brookhaven LHC before it was turned on calculated a maximum chance of 20 in a billion that it would destroy the Earth. To me this seems *way* to much of a risk. Accelerator physicists may be more interested in their careers than in small possibilities of annihilating the solar system...