I don't want to be a downer, but please be cautiously optimistic.
Brain tumors very widely in the response to treatment. There are issues with getting to the location without causing severe damage, removing all of the cells and regrowth. Chemo rarely works because the blood/brain barrier prevents most chemicals from entering the brain.
The decrease in pressure on the brain from removing the tumor is probably responsible for the rapid improvement - and that is wonderful. Positive thoughts that the news continues to be good.
As to JJ, most people around here consider him a jerk. But to be fair, he does get hit up for "favors" all of the time. If the person is a very distant relative......
Skin kids - Jason, Kevin, Allison
Canine kids - Bennett & Bailey (always in our hearts), Riley, Banker, Rogue and Boz
Feline kids - Zoey, Talley and Abra