[GAMEPLAY] Knocked up in Cataclysm and landed outside of it

I haven't been able to reproduce this, but here were the variables when it occurred before:

• I was on the edge of Cataclysm
• Cataclysm was right next to a wall
• I was knocked up by Jarvan while auto attacking him
• I was auto attacked by Jarvan while in mid-air

Here is a video of the bug: https://www.youtube.com/watch?v=BW2H2p-2Yxs&feature=youtu.be

I was playing as Fiora, but my dash was on cooldown (used in the beginning of the video) so that is out of the question.