Funny grass...

You are sure it wasn't the "Cleansing Rx"?

The roots of some grasses are potent medicinally, So I was hoping that was the issue.
Is there alot of Rabbits in the Field?

I've drunk that much grass, but a different specie...yours may have been a Bluegrass Variety (Poa sp.). Here where I'm in PNW, Bluegrasses aren't the first choice for a "low-maintenance" yard.