did anyone even read my post?
It actually said most of that already in much less words.
The bump starting idea, was to see if the engine would turn over, then you could diagnose the fault after.
For example if the engine wont start with a bump start that could mean its seized, and would be why the starter motor wont turn over.
The "locking up" he is describing could be his explanation of it rapidly slowing down, which vechiles do during a bump start, as the motor turns over.
I totaly agree with Denzee,
their may be fluid on the piston crown stoping the engine from compressing, and as he described correctly will bend the con-rods if you try to hard. so follow his advice with taking out the plugs, and checking for fluids on piston.
One thing you could try, would be to take the starter motor out, and then connecting the jump leads from the car to it, ground one out on the outside, attach the possitive to the possitive connection, if the starter motor turns then your engine has probably seized.