DNP is probably the craziest (but most effective) fat loss solution I have heard of.
Primarily used as a textile dye and wood preservative, DNP induces extreme thermogenesis in users. It increases your metabolic rate by up to 20%, and you are basically being cooked from the inside out.
Pros: Rapid weight loss, 10-15lbs a week is not uncommon
Cons: Fever, cramping, nausea, diarrhea, deteriorating eye site and in some cases, organ failure and death.
I won't touch DNP with a 10 foot pole, but I know guys who are willing to risk everything for that certain "look".
I would much rather use Clenbuterol or Albuterol to lose weight.