I believe -- and may be wrong, because me, I'm no authority -- that Cherenkov radiation will produce a visible blue glow even if the particles in question aren't exceeding the speed of light in your eyeballs. Which is why, for example, you can photograph it.

In any case, no baby, I wouldn't want to see it. I'm pretty sure that there being Cherenkov in the visible part of the spectrum and near enough to you that you can see it guarantees that you're being hit by enough ionizing radiation to kill you within the fortnight.