Our CRAZZY patch of grass

We had a tree taken out of our back yard a year ago and what was left was a ugly scar in the middle of our lawn. We threw down some grass seed and waited for it to start looking better. The grass slowly started growing and filling in and we were happy with how it was looking. But now, that patch of grass is insane! We maybe planted magical grass seed because it grows 20 times faster than our other grass. Benji mowed the lawn and this is about 5 days later:We've had to start weed eating it regularly between mowing. It's fun to watch my boys and our cat play in the forest of grass we have growing in our backyard.