When you're facing a tank Mismagius with your stall team so you can barely deal with it and toxic misses before it uses substitute which would've prevented so much trouble.
When Skuntank's crunch does 40.1% to Gourgeist and lowers it's defense but leech seed and will-o-wisp both missed.
When Focus Blast from Raichu lowers Lickilicky and Lanturn's special defense BOTH.
When Skuntank crits you to death.
When you're paralyzed for 4 turns in a row.
But then you PREDICT ha focus blast and switch into Gourgeist and he forfeits on the SPOT and you retain your 7-0 record.