Continuity mistake: When Tom Cruise is lying in his hospital bed and begins freaking out, he knocks over a pitcher from the small table next to him. In the next shot the pitcher is back on top of the table. (00:57:00)
Continuity mistake: After Kovic is walking with his crutches, falls and his bone breaks, the crutches keep changing positions between shots.
Answer: He doesn't see anything. He hears his blood dripping back into the makeshift machine the doctors have set up and realizes it isn't working properly. In the previous scene he was told that if they couldn't get the machine to work, he would never walk again.
No, in the previous scene he was told that if they couldn't get the machine to work, he would lose his leg. He was already told he would never walk again.