For example, when running late to class, I come across my classmates going out of the classroom. I ask, “Is there no class?” They reply, “There was, and you’re absent.” I become distressed and sad, but then they say, “Just kidding! Professor is absent.” We all laugh about it.
Another example is when my mom asks me how I did in an exam, I tell her I I failed and she becomes distressed and comforts me. Then, I tell her “Just kidding! I aced it!” She smiles and calls me names.
Are those instances considered sinful lying?