Random plant event: Tetrastigma voinierianum cutting sprouts new growth, finally

I took two cuttings of Tetrastigma voinierianum home with me from work as I was leaving last May. Stuck them in potting mix at home, and waited. One died; the second had rooted well enough by September that I declared it an official plant and added it to the plant count and all that.

They're supposed to be super-fast, super-aggressive growers, provided you can give them enough heat and humidity, but mine did nothing for four months after I made it official. During the mid-January round of watering, though, I saw this:


Closer-up:


The reader will be forgiven for not understanding why this is a big deal, but I think it shouldn't be so hard to figure out why I'm kind of excited to see a plant do something, anything, after an eight-month wait. I've waited longer for less, though, I suppose.

Once Tetrastigma starts, though, it works pretty fast. The below picture is the same bud, only five days later:


This, of course, brings with it a whole new host of problems, as every source I've seen mention this plant underlines that it can get huge very rapidly. Below is the parent plant, in what looks like maybe a 10-inch pot.


It didn't grow terribly fast at work, mostly, I think, because we weren't watering it enough, and it was rootbound. I moved it up twice in the year and a half I worked there, into a 12-inch pot and a 14-inch pot, and it wasn't until it got into the 14-incher that it really took off and grew, growing tendrils that wrapped around anything handy and carrying itself along some of the support bars for the greenhouse ceiling.

Which I guess I can look forward to something similar, in the near future. Should be a good time.