In the storyline (which seems to have taken place within the estimated span of 2-4 weeks), The Joker seems to be able to get mass volumes of explosives seemingly wherever he wanted them.  Literally hundreds of metal barrels filled with a liquid explosive of some kind and who knows what else (enough to blow up large buildings) in:

2 buildings (seemed like warehouses)
2 large boats
A major metropolitan hospital

1. Where could he BUY such large amounts of explosives from, considering Homeland Security?
2. How does he get such mass volumes of explosives into the buildings without anyone noticing?  Especially the hospital?  Considering he would need large trucks, dollies, drivers, and various henchmen to move it all in, and even more people and time to hook the explosives up to detonate in sync?
3. How could he replenish his henchmen so easily and regularly considering that he killed so many of them?  How does he generate and maintain loyalty, and how does he reward that loyalty?
4. If he burned mountains of money and didn’t care about having very much, how did he pay his henchmen?  Did they just work for free?
5. How did he do all this and still be able to be multiple steps ahead of his opponents?

Responses have to be PLAUSIBLE, believable, and reality-based.

Well anyway, so he’s got all this nifty sci-fi 30-million cell phone bat sonar 3D thing hooked up to his headgear, and is able to “see” every everything up until just getting to the floor The Joker is on.  So, uh, what – he couldn’t see that there were dogs up there and be prepared?  I mean, maybe if he’d have taken that one tiny precaution since he was doing that pretty thoroughly floor-to-floor anyway, he’d have thought to stop by a Ralph’s on the way and picked up a couple juicy raw steaks for the puppies.  That’s usually the way every other protagonist in all other Hollywood movies distract guard dogs.

My friend also mentioned something else that was odd about that scene – The Joker had Batman pinned and he uses those projective “knives” (or whatever they were) to quickly get The Joker off him.  So you would think they would be gashing into The Joker’s face based on the angle, otherwise if they were just a distraction then it was a pretty lame use of that gadget.  This one I’m not so sure about (maybe he did have huge gashes or slices on his face or neck when hanging upside down?), but worth mentioning.  Still, with all of Batman’s fighting skills, he couldn’t get a single scrawny Joker off of him from that position?  Even a low rung UFC guy can do that with a simple leg grapple.  Maybe Bruce needs some tips from Randy Couture or Chuck Liddell?