A word of caution, regarding King Cobras.
Cobras and other elapids are generally very nervous snakes. While cobras are generally not as fast as most of the vipers, King Cobras are every bit as fast and aggressive. In addition, King Cobras WILL advance on human targets if they feel threatened. It is said that they have a disposition to match their name.
I hazard to guess that if it decides to strike (as opposed to feint) and you are within range, it will be damn quick. In addition, a female King will not hesitate to attack anything approaching her nest. (King Cobras are the only snakes that nest to lay eggs)
With regards to snakes not having enough brain to get "angry" I must disagree. King Cobras in particular exhibit intelligence. They avoid other venomous snakes, for fear of being bitten, and feed entirely on harmless species (the easy kill). They appear to be much more intelligent than other cobras. Underestimating this could prove fatal.
Some stats :
King Cobra can see a moving person 330ft away.
King Cobras DO hear. Sound is transferred from skin through jaw muscle to reverberate off of quadrate bone next to the ear bone. Not having an external ear doesn't particularly hinder hearing ability.
A King Cobra's hiss sounds more like a dog's growl (intimidating for sure)
Venom can kill an elephant.
Moral : Always carry a mongoose.
From academia, not experience.
Regards,
Shaun.