There is a current bug with the hunter talent- Lock and Load - Spell - World of Warcraft
Lock and Load- You have a 100% chance when you trap a target and a 10% chance when you deal periodic damage with your Serpent Sting to cause your next 2 Arcane Shot or Explosive Shot spells to trigger no cooldown, cost no mana and consume no ammo. 30 second cooldown.
With the 10% proc, the sting should theoretically (assuming no rng) proc every 30 seconds: pushing hunters away from the trap dancing method of DPS.
Trap Dancing-Laying a trap at a boss's feet to get a 100% proc for LnL then running back out to continue DPS.
This 30 second cooldown means traps like Immolation Trap - Spell - World of Warcraft would normally not trigger Lock and Load because of the small hidden cool-down if used right after a Lock and Load Proc from a sting.
The Exploit to increase your dps
Frost Trap - Spell - World of Warcraft is not being effected by the 30 second cooldown on LnL. So you can get a LnL proc using a sting, then run up and use the trap right after, avoiding that nasty cooldown. The same should apply using Frost Trap to trap dance, while still getting procs from Serpent Sting(2).
I have not tested if option (2) is better or not, because you are missing out on the damage from Imo. Trap: but who knows...Test for yourself =D
by i cut u up