1995 Nissan Quest.... leaking from under back half of van

I just bought a used 95 Quest, however there is fluid (not gas or oil) leaking from under the back half of the van, it comes out in a full-area spray or splatter. I have no idea what to think... please help.

check for exhaust leak
byproduct of running a gas powered engine= carbon dioxide, other gases, + water vapor...
maybe you have a leak along the exhaust pipes...it's pooling in an area and sputtering out that hole?!?
do you have rear ac as well?