Funny. I loved the "tie my shoe" moment.
One question though. If a handicapped, elderly woman is missing from the house, why the members of the house behaving like "no big deal". They should be panicked and crying unless they don't care about the grandma, which is obviously not the case.
It would be more hilarious if someone on the road has captured Grandma's havoc on the mobile phone and TV News is playing that footage and worrying about who the elder woman is and now where is she? MOM and 2 girls watching that news in disbelief and suddenly knock on the door.