How do I defeat Vettenmyer?

Hint 1 of 19:

You have very little time before he comes in and overpowers you.

Hint 2 of 19:

It would help if you could stall a bit.

Hint 3 of 19:

But it would be just as nice if you went back in time.

Hint 4 of 19:

Have you read the sign in between the two platforms?

Hint 5 of 19:

Get on the right platform to travel back in time.