ZN pickoff yesterday 28k+

anyone else notice the 28000 lot that picked off what didn't necessarily look like an honest bid yesterday after the close? i think it was at like 230 or something like that someone came in for 12k bid at 124200 then bumped it to 22k and then went to 32k and someone 1 clicked through them and there was a 28XXX print in the time and sales. that's the largest execution i can remember seeing in the open markets since the zf was ratio.