The constriction of the air flow, and the weight of this nozzle will give the deflating balloon an apparently more controlled motion (I don't think the hyperbolic shape does contribute other than visually). Depending on the balloon, you might see it slowly lifting up or just levitating around. 

Fun to watch but otherwise completely useless. But, hey, it's a quick print and might be an option for some last meters of your filament… (~5g/less than 2m PLA)

Printing

This model is printed top down and should be printed in vase mode with bottom layers reaching up to 12 mm. E.g. if you are printing with 0.2 layer hight, you should select 12 / 0.2 = 60 bottom layers. For 0.3 layer hight it would be 40 bottom layers.