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 no shit there i was, 100 feet underwater when i saw it: the spiny, orange and red beautiful predator that has been playing havoc with the entire ecosystem since being introduced to it over a decade ago.  with no natural predators, the lionfish has been able to spread like wildfire throughout the caribbean.  scuba divers have been reporting them, catching them, coming up with recipes for them, all to incentivize reducing their population and bringing the ecosystem back into balance.

so here was my opportunity to help. i stared at it and it just hung out there, next to what was the tail section of the hms rhone in the british virgin islands.  thought about what i could do... didn't have a net, didn't have a speargun, but i couldn't just swim away.  that was my fu.

i reached down to my leg for my trusty dive knife, slid it out from its plastic sheath, and gripped it lightly in my hand.  it was black, the steel begged to be thrust into the unexpecting predators flesh.  i had a vision of emerging from the dive with the fish on my knife, victorious.  i did a few practice thrusts out of sight of the seemingly oblivious predator.

i lunged with the knife.  and quickly learned 1) people aren't as fast as fish and b) a lionfish will fuck you up if you're not paying that close attention.

TIFU by thinking I was faster than a lionfish