As far as adding a foam controller, I've never used them.
I would think your biggest problem at this point is finding a way to contain the mess.
If your airlock isn't clogged, I would say, let it work itself out. If it is clogged, then you run the risk of it really blowing it's top and having to contend with the aftermath. Maybe find a way to let the fermentation happen. Assuming you're using a bucket, put it in the sink and loosen a side of the lid?
Whatever you do, you've gotta get video of it...