Zilean passive giving 1's maybe 2's of thousands of EXP

So if you wait until someone is only a few experience points off from a level (Tested in ARAM), then start channeling his passive on them. If they then kill something such as a minion that allows them to reach the next level, then both Zil and the player being targeted will receive a full level's worth of experience and reach the next level after that.

E.G. Ez is level 14 > Zil starts channeling > Ez hits level 15 > Zil finishes channeling > Ez is level 16