SPOILER ALERT: Do not read this if you want to wait to see the movie first.
At the end of Terminator Genisys,
Pops pushes John Connor inside some sort of gyroscope thing which would seem to pull John Connor apart. This was happening at the same time that the entire complex was blowing up.
The gyroscope thing looked like
the time machine they used at the beginning of the movie, but Pops said that Skynet did not have the ability to send a person through time in the apparatus yet. So what was happening when it seemed that John Connor was being pulled apart by the gyroscope thing? Is the time machine really a big magnet? How does it work?
Also note that
it did not actually kill John Connor, as shown in the bonus scene that you see if you sit through the credits. So perhaps the gyroscope thing actually protected John Connor during the explosion. How does it work?