the thing last boss

while i am shooting the last boss after i shoot all barrel and the tenical the screen goes black or comes up with a runtime error can anyone help me with this

i've ran into the same problem, but i ran the disk through a CD cleaner and it came back fine. i still really don't know what the problem was, but it seemed to fix it for me.

the end cut scene was killer. after you kill the last Thing boss, everything explodes and you ask McGrady where he has been and he says he's been on vacation.