Those observing the casting of this spell usually find it disturbing. This normally requires a fright check from anyone not used to gory sights. This is a natural consequence of the caster ripping their own hand off. It isn't likely to phase someone that's seen it cast before, phobias not withstanding.

Wizard Hand [34] 
    Extra-Flexible Arm [3.5] 
    Long Arm 5 [30] 
        Cosmic (Not Connected) [+50%] 
        Extra Reach Only [-60%] 
            No swing damage bonus 
    Magical [-10%] 
    Spell Components [-20%] 
        Must say "hand" in Latin 
        Caster must remove their hand by pulling it off 
Level 2 [45] 
    Add Extended Duration (x3) [+20%] 
Levels 3-7 [56/67/78/89/100] 
    Increase Extended Duration by 1 level [+20%]