Waking up in the aftermath of a meth-lab explosion might be less disorienting than watching this. And if you think there's no room for more, Neveldine/Taylor are probably a weekend and a bag of crack-filled Pixie Stix away from proving you wrong.
Basically the co-writers and co-directors Mark Neveldine and Brian Taylor sneer at any kind of rules, decorum or morality. Anything goes, as long as it's within the realm of exploitation-level "B" moviemaking.
The constant escalation to [the filmmakers'] inventive insanity is so breathtaking, it's like a slap in the face to the tired hacks who make the glossy hidebound junk that passes for an action movie these days.