What would happen if i mix ecstasy and oxycodone?

I am just curious if the oxycontin would enhance the ecstasy or cancel it out? I am not a drug user unless you count pot as a real drug, I'm just having an argument with a recreational drug user friend and I wanna know who's right.
I think the oxy might cancel it out, but who knows...
I'm only looking for answers from experience or real knowledge, not smart ass comments. thank you. :)

: http://alcoholdrugstreatment.info/what-would-happen-if-i-mix-ecstasy-and-oxycodone