Suppose Bruce Banner goes back in time, convinced that the Hulk is a stupid menace. Let's say he also borrows Quicksilver's speed abilities (maybe the Flash is more appropriate, but based on the recent X-Men movie Quicksilver is plenty fast enough).
Anyway he decides to run away from the burst of gamma rays that turns him into the Hulk (assuming this would actually do the trick). Now obviously, they will still travel at the speed of light. But, due to frequency shifts, shouldn't he eventually look behind and "see" the burst of gamma rays as really just color, starting with violet? If he kept running, would he not see a rainbow cycle of colors?
Would this mean that the flash could see the whole spectrum in terms of the visible spectrum (that is, he wouldn't see new colors, but new sources of colors), depending of course on his speed?
I guess this is all just a red-shift blue-shift (one shift two shift) problem, so I think it is a valid hypothesis. Am I right, or is Banner doomed to become invincible and mean?