you probably won't be a vegetable....
expect to be walking around in a stupor for a little while completly unable to describe it anyways....
expect to be humbled in the face of your own insignificance in this world.....
expect to die, and then be able to accept it and move on....
there will likely be more more "you", i would be suprised if you could even still say your name if asked it, assuming its 20 pretty decent hits.....
it could possibly be the most amazing, terrifying, or awe inspiring experience of your life, or any combination of the above or maybe all of them....