Relevant stacks/reads:
UTG+1 Average TAG/normal 90K
HJ bad rec TAG/nit 19K
CO Average reg with online experience 98K
BB (Hero) 170K

Blinds 2k/4k/400

We are about 10 mins away from bagging for the night. There is another flight of Day 1 to be played. Players are allowed to play multiple flights and take biggest stack to Day 2.

UTG+1 opens to 10K, HJ jams. CO does some talking out loud and seems to be trying to figure out what will happen if he flats. Then he jams.

We have in the BB. Call/fold?