In the film's climax, Neeson hops on a monorail with the microwave cannon and heads toward the city's main water distribution center, which is inexplicably a stop on the monorail's route. Batman intercepts the monorail to exchange punches and one-liners with Liam Neeson, then leaps to safety just as the monorail derails and explodes.
But Wait a Minute ...
There was absolutely no reason for Batman to get on the monorail.
You see, before Batman hops onto the train to beat up his former BFF, he gives the Batmobile to Commissioner Gordon and tells him to blast apart the monorail's tracks, engineering the derailment. So Batman knows the train is going to crash, killing Neeson and destroying the microwave cannon. Why the hell would he then Batman his way up to the speeding monorail car and risk his life in a brief punch-witticism contest? Just for the satisfaction of spin-kicking that goateed face one last time?
"Seriously, I'm rich; I will buy you a razor company to get rid of that thing."
Come to think of it, why the hell did he put Commissioner Gordon in the Batmobile and task him with making the critical train-destroying shot? Gordon has never even seen that kind of sophisticated technology before, and he even misses his first shot. What if he hadn't managed to blow up the tracks in time? What if he'd pressed the eject button by accident?
"I played Space Invaders back in '79. I got this."