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 this has happened over the span of a couple of months. i worked with this youth group in a particular neighbourhood and knew a lot of the parents. this one lady in particular was always very warm and we would chat often. 

so one day i see her on the bus pushing a stroller with a baby in it (when did she have a baby?) and with the most emphatic smile i can muster up i look her right in the eyes and give her the warmest "hello, how are you doing?". she doesn't respond. even looks disgusted a little bit and i shrink at how cold she's being. stunned, i just kind of take my seat and feel like i was just punched in the face. then i doubt myself, maybe it's not her.

that's fine i can't wait to tell my real friend and have a great laugh over this! a couple of weeks later i get my opportunity, i see her getting on the bus that goes from downtown to our neighbourhood. i approach her with a warm "hi! how are you - shit, fuck, goddammit that's not her". from this woman's face, you would have thought i had crapped on her shoes or something. i just want to disappear as she spits out "do i know you?" with enough venom that i should probably go to the hospital.

i see this doppleganger a third time on the bus, but fool me three times right? no. i see her and i don't even look in her direction. i've beat the evil doppelganger system. a few more weeks pass and me and some friends go to marble slab to get some ice cream. i finally see my friend, my real friend. she's a french canadian with a black husband, 2 daughters and son. my eyes can't fail me this time since i've got multiple confirmations. well you know that nagging feeling you get when you are about to do something and just figure you need to conquer your fears? i got that feeling but i thought i began to doubt myself because of the evil doppelganger. i shut myself up and strut over and with relief exclaim "it's so nice to see you! how have you be- why are they staring at me? when did they get a son? oh sonnnovabitch. they give me the blankest stare and no one says a word. i just stand there awkwardly, realize my idiocy and go and sit with my friends at our own table... 2 tables next to them... the only seat is the one that is facing them so i awkwardly point is so that my breath can't even disperse into their general direction. 

i manage to laugh it off as my wife has now been a witness to 2 of these episodes and i just try to forget their stares. then i really calm down once the family leaves. until the husband comes over and asks me how i know them. his tone was okay but i felt like i could just feel suspicion all over me, oozing out of the man. i asked him if they lived where i know my friends does and told him i mistook his family for a friend's... well i got the neighbourhood close enough that he gave me a look and confirmed that is the area they live and ask if i do summer camps because "we thought we knew you from there". i say i don't and he joins his family and they leave. my friends make me feel worse by speculating as to what the man thinks my intention with his family is.

i want to visit my friend to tell her the story but now i'm afraid that she exists!

necessary

TIFU by greeting an acquaintance on the street multiple times. Each time being a different doppelganger.