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: reddit, today i fucked up hard.  i was out shoe shopping at my local cheap shoe joint.  my old cross trainers are finally on their last legs.  myself, not really willing to drop several hundred dollars on a new comfy pair of sneakers, went to my local discount shoe store.  all was well.  the sun was shining, a rarity for canada when winter is only a few blustery weeks away.  my poor, worn-in nike's had soles as thin as paper and some metal/plastic bastard that kept jabbing me in the left heel.  it was time to send them to the garbage dump in the sky before i either tore the soles of them completely off or my shoe's defense mechanism of that heel hook thing decided to do some real, lasting damage.

i'm browsing around checking out the newer nike's, adidas, new balance, etc.  of note, this store is located about a 10 minute drive from a *very* posh neighbourhood.  it is not uncommon to see your typical rich stay at home mothers with young kids in tow in this mall.  usually i think nothing of it and continue on with my life.  that is when this uterine urchin from hell appeared.  she was this little blonde "princess", and i use this term only because it feels weird to call a toddler a bitch.  eh, fuck it, she was a bitch.  she will likely be a bitch when she is older.  this kid was running around, throwing shoes every where, disturbing other customers by running as fast her little pudgy legs could carry her.  she bumped into my legs full speed a few times.  the mother was very stressed trying to wrestle this kid into submission whilst also trying to find a pair of new shoes for her older ~6 year old son.  this little blonde demon was not listening, and she was definitely old enough to know better.  i'd hazard she was probably around 4.

this continues for several minutes as i find a pair of shoes that aren't atrociously fluorescent and are within my budget.  i make eye contact with a dead-eyed employee about 15 feet away who had been turned into the personal slave of some elderly man with gigantic, crooked, swollen feet who was determined to try on every pair of shoes they had in a size 8.5-10.5.  sigh.  there was a mountain of shoe boxes like a siege wall around the two of them.  i knew he was going to be there for a while.  i turn around and the young man helping the mother also had a dead-eyed expression, probably from the splitting headache the little girl was causing him.  he asked quickly if i needed a size, i nodded in the affirmative and he ran off to the back while the young boy and the mother decided between the last two pairs they had narrowed down to.  of course being interrupted nearly every 10-15 seconds from a shriek or a flying shoe from the other kid.

this is where i fucked up.  the girl tripped on a shoe she had previously thrown off of the rack and fell on her face.  of course being so young she was like a rubber ball and bounced right back up and ran by me.  i looked at her and she had a red mark under her nose.  i commented to the mother "i think her nose is bleeding from tripping over that shoe."  the mother retorted a little snarkily "excuse me?"  i repeated my previous statement.  she replies tersely "it. is. a. birthmark."  i froze.  i looked up and made eye contact with the little girl.  then the mother, and then the son.  all three of them had this similar kind of birthmark red thing under their nose.  that is also the moment when the son started to cry.  then the other kid started to cry because the son was crying.  apparently, from what i could gather through the incoherent rage the mother was yelling at me was that her son was very sensitive about it and got teased for it endlessly at school.  the mother was spitting venom and glaring at me.  she was now screaming about making her children cry, how i ruined their day together.  you name it, i heard it.

the manager got involved.  the woman was screaming at him about how horrible of a person i was.  she was basically inconsolable with rage.  i was asked to leave for causing a disturbance.  i never did get my shoes, and the fucking heel spike is still burrowing its way into the back of left foot.

TIFU By Trying To Be Helpful To A Stressed Mother