Evan,
Got this as a seedling summer 2012. I saw the mother plant at EFG and they had it in a 20 gallon nursery pot and it was in dire need of repotting.
It took awhile to get going but this year is going nuts. I re-potted it in late February, and I tipped the pot over yesterday and it has roots growing out the bottom already.
The little vine you see is Cissus amazonica. ( Vitis amazonica )
Amazon Jungle Vine (Vitis amazonica)