ttagpine has the idea. To put one's head into the idea of absolute nothingness is akin to finding enlightenment.
The actual existence of nothingness I don't think would be possible. It's an interesting question, but on the basis that we do not know how to really understand the idea of what absolute nothingness would look like (but by doing so we break the boundaries of the mind), to logically explain it outside anybody's hands. One must lend themselves to a more ... intuitive explanation.
Short answer: there would be enlightenment.