Series/ Movies Mistakes

[TN1]

do you sometimes notice some scene mistakes in series or movies? like in My Girl, when Lee Dae Hee was walking on the street with cars on the side of her then Lee Dong Wook was coming, LDH suddenly bent down to tie down her shoelace then LDW stop behind her then the cars on her side (LDH) was gone, then in Winter Sonata, Choi Ji Woo was holding a bag before and in the next scene with the same place she doesnt hold anything lol...