1.1 Sniper messed up

[V-Man]

It really does feel like it :/

I think the effect comes from the distress of being hit and knowing your is health going down. Probably this effect is amplified by things such as

[SELECT ALL] Code:

damageindicatoralpha
damageindicatordist
damageindicatorsize
damageindicatortime
damagescreen
damagescreenalpha
damagescreenfactor
damagescreenfade
blood
maxroll
sounds 26 through 31

etc.
I can't find anything in the code that would suggest your opponent's view shakes in any way when you hit them. The devs have specifically stated that this does not occur. So it is a myth.