• When people are unable to manage small tasks

It does happen in houses, some persons are very lazy and they don’t bother to change the roll of tissue when it is finish. When they need the tissue they do not find it on time and this is the most annoying thing for them.

• When the doors of the same equipment open from different sides
  Nowadays, people are so busy in their routine work. They want to do things in an easy way. Sometimes, it happens that you are in hurry and you want to pick up your lunch from fridge but you may not be able to do it.