Is there any way to travel through the subway?

Hint 1 of 5:

Well, there's no way you're going to get power to the larger subway car.

Hint 2 of 5:

But the smaller car is powered.

Hint 3 of 5:

Too bad it's too small to hold you.

Hint 4 of 5:

But it's large enough to hold Falstaff.