Originally posted by: Hikyuu
Naruto-kira.. you need to think before typing....Sharingan can copy Taijutsu.. last I checked that has no hand seals.. sure it is movements but still. When using a certain technique, the proper chakra molding and other chakra properties need to be just right.. so it cannot just be the hand seals it detects.
Still, remembering taijutsu is simply memorizing and imitating movement.

I don't believe a sharingan user can use a technique like Rasengan through the copying ability.