Some people take nap in any vacant space. Some take it in parks, gymnasium or even in a waiting shade. In fact, there are some who take it even in a vehicular sits. For instance, bus passengers sit. Those passenger keep such habit like without realizing the possible biter things might happen to them when the bus collides or if they passed over their destination reflected by their ticket. But the worse thing might happen to them is the embarrassment without their awareness—when the saliva free-fall from their mouth.