stunty and dodge question

I have just played a game with gobs ( gob-smaker vs kult of rakamus) . I tried to jump in a cage with a chainsaw.Having stunty i thought , from the description , a 3+ was enough , when i rolled 4 it keep asking me for a 6+ .
I m just asking for clarification on the matter as i think i do not understand the skill stunty

Can't quote as on phone but from the Stunty description:

"Stunties that are armed with a Secret Weapon are not allowed to ignore enemy tackle zones, but still suffer the other penalties"

@darkson
I clearly missed the info about secret weapon
Thank you for pointing it out

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