Now that I think about it.... If the nose door was spotted open, then they could have had a COMPLETE hydraulic failure. In the event of one the nose wheel door Droops down. e probably for got to drop the gear manually. As far as him noticing the gear not being down cuz he didn't feel the wheels touch is BS. Cuz when he brings that power to idle, that airplane comes down. remember, its a jet. Not a prop! It takes time for those engines to spool up to thrust that will take em back in the air.
Think again you are so wrong! Turn in your EMB-145 rating. Stop thinking (guessing) and you'll find out soon enough when the NTSB report comes out and the crew gets plaques on their walls.