Yeah, I'm with you on this one. This is morning of day 2 for me on my first Master-Cleanse and I did the same thing with the salt water / fresh water chaser this morning. But I couldn't keep it down for long... though I tried. High concentration of salt is just too much for an empty stomach. My tummy was glad to be rid of it. I hopped around for a while and that seemed to do the trick for me :)
On another note I slept like a log last night! I haven't done that in a long while.