How would you think it would work?
Does it get the chance to grapple? If so, what's the equation you would use for the cmb?
Let's combined this spell with the Toppling metamagic feat. How awesome is having a grappled and tripped foe.
BTW, this mancatcher does 1d8 + (1 per 2 CL) instead of 1d2. And it targets touch AC.