Disrupt

Consume Magic will heal a Havoc DH, but there is no documentation on how to trigger this. At 700 illevel gear, the heal is about 35K.

Some successful interrupt don't generate healing.

Arguably one of the best interupts in the game. 20 yard range is pretty good for a melee, and it gives you half your resource bar, on top of that standard melee cooldown. The only real compeition is counterspell from mages and wind shear from shaman, and even then it's not clear cut.

Edit: Has been MASSIVELY toned down in battle for azeroth, half the range, only gives 30 resource. It went from being one of the best, to just a bit above average, which is a shame, as Demon hunters were billed as the proper anti-caster that we hadn't had since unholy tanks in wrath.

Learned at level 19, not 29.