Depends really on how James casts it.  Does he require overt hand gestures or loud chants? Does the blessing create light from the caster? Do the blessed start glowing with Source?  I'd have to see what you come up with to know.

Give it a try >:)

Lol yeah everyone seems to be dealing with things very well.  Shock and adrenaline, plus non-stop sensory data, is maybe the explanation, if one is required.  Poor James lol