[Oldpaddy]

That's a first with the spike fermenter in the 2 years I've owned it. 10-11gal, Wlp037, NBA. I've used this same yeast 3 prior times and this didn't happen.

Edit: Not showing my picture for some reason.
Here's the link: https://ibb.co/RB2qfWD

[House Of Ales]

I’m not sure what to say other then I have never seen anything like that. Quite active for sure.

[redrocker652002]

That happened to me a few batches ago.  It was Bry97 and it was so good it clogged the airlock and the lid unsealed.  What a mess, and what a PITA to clean.  LOL.  My daughter told me she thought she heard a popping sound but didn't know what it was.  Well, I know now.  LOL.  Good luck and at least you know it is doing it's thing.