Internet of Things (IoT) technology enables the transformation of urban habitation towards Smart Cities. 70% of human habitation will live in Smart Cities by 2050. IoT is the backbone technology of Smart Cities enabling new services through certain structural parameters. One such parameter is the smart way of living which aims in providing all the necessary technology required to transform human lives to a viable environment of prosperity. Elderly people is a parameter of highly importance in Smart Cities. IoT provides the technical opportunities to elderly and/or impaired people to live and prosper in the context of smart way of living. In this paper, we propose a model for validating elderly and/or impaired people fall. The proposed model is able to define whether the event is a free fall or a bending of the individual towards the floor surface. The IoT equipment we use is the wearable in clothing altimeter sensor.