Valg and I dreamed up (and coded) that whole set of A-P weapon skills together. Vault was one of the ones I coded.

The crazy-ass yell was mine. Believe it or not, it didn't occur to me that vaulting on a target that couldn't see the vaulter would be the most common use of the skill. I somehow forgot about sleep and thought vaulting on a blind target would be ultra-rare.

Valg later noticed the yell and took out some of the profanity. See, it's not just the stuff you love that he nerfs! :(