@PAPA_Doug and I took a quick trip up Pinball Mount Sinai, and here is what we heard:
Outlane drains are not allowed to be actively saved from a center post. If it goes down an outlane and the player actively tries to nudge it back into play, then it is a death save.
It does take skill to pull this off in Xenon, just as it takes skill to execute a death save. Both just happen to be illegal.
Make sure you rule it correctly at Pinburgh 