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 ear off. It isn't likely to phase someone that's seen it cast before, phobias not withstanding.

Clairsentience [25] 
    Extended Duration (x10) [+40%] 
    Aware [+50%] 
    Mobile 2 [+80%] 
    No View Changes [-80%] 
        Can't pop around like Clairsentience normally works 
    Clairaudience [-30%] 
    Temporary Disadvantage (Hard of Hearing) [-10%] 
        One eared caster loses the Aware enhancement instead 
    Physical Presence [-60%] 
        Caster's real ear is the remote listening device, but it's still invisible 
        Cannot listen from inside an object 
        Injury over HP/4 from any source deafens caster in that ear 
        Caster's SM-7 to strike 
    Magical [-10%] 
    Spell Components [-30%] 
        Must say "ear" in Latin 
        Must remove ear at completion of spell using hand 
        Must hold bat fur ($0.20) 
Levels 2-5 [35/45/55/65] 
    Increase Extended Duration by 1 level [+20%]