The REAL Pickle Surprise is in your first hi-rank Crimson Qurupeco quest. Fresh out of low rank, in low rank gear, and Peco lets out this roar you've never heard before, and you're like "Okay, so I wonder what bullshit that is?"
And then the music changes.
Oh no, I know all about that. First time I fought a high rank Qurupeco in Tri, he made an unusual call and me and two of my buddies were like "Eh, must have failed calling Rathian."
A few seconds later, Deviljho showed up, killed all three of us and we flipped out and basically abandoned the quest cause anywhere we went, Jho followed us XD
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DragoonShadow
I had a Pickle Surprise earlier hunting Odogaron....He kinda picked Odogaron up and...Wound up killing him before I could. Was priceless.