If someone walking through the affected area is being wary, this can be dodged. If not, then they'll be tripped.

Telekinesis 6 [45] 
    Extended Duration (x300) [+100%] 
    Independent [+40%] 
    Area Effect (2 yard radius) [+50%] 
    Persistent [+40%] 
    Animation (Can't Fly) [-30%] 
    Only to Trip Those Walking Over [-80%] 
    Only Works on Plants [-40%] 
        Living or dead 
    Magical [-10%] 
    Spell Components [-20%] 
        Must say "trip" in Latin 
        Must gesture with hands 
Levels 2-5 [60/75/90/105] 
    Increase Area Effect by 1 step [+50%]