Definition: In this task, you are given a Reddit post as a text. Your task is to generate a title for this text. The title should start with "TIFU by", followed by a situation that caused humor. The title should contain 7-12 words, ideally.
Input: Text: so my dad and i were in walmart and we saw a boy about 5 or 6 years old having a meltdown because his mom wasn't going to let him buy a toy.  i made a comment about how the boy was being ridiculous.  my dad looked at me and said "you were probably like that at his age."  i replied without thinking, "how would you know? you weren't there." my dad's face instantly changed from a normal expression to a sad/angry one.  i didn't realize it at the time that i had hurt my dad's feelings.  

the reason it hurt my dad's feelings is because when i was a baby my mother left my dad one day while he was at work. she wrote a letter that explained how she was unhappy in their marriage and that she was taking my sister and i with her and moving "home."  my mother's home is the tiny island in the south pacific called guam.  my dad lived in colorado.  i did not meet my father until i was around 11 years old.  it wasn't my father's fault he wasn't there when i was growing up.  

a few years later while my dad and i were hunting, he had told me that i hurt his feelings that day and he hadn't forgotten. he knew i had not done it on purpose but it reminded him of all the time he missed out while my sister and i were growing up.

TIFU by saying to my dad "How would you know? You weren't there." My mom "kidnaped" my sister and I.