Laughing at a superstition

Aslaamualaikum
In the pakistani culture people are very superstitious and they normally say if one person accidentally steps on another person’s foot then that means that someone will come to their house i.e. visitors.

If a Muslim gets stepped on her foot by another person and they laugh and joke about this (stepping on foot) and verbally say that someone will come to their house. Although the Muslim says that she is only having a laugh and a joke. Does this Muslim become a kafir by laughing and joking and verbally saying the above explained or any of the above mentioned superstition?.