Jarrod Brom, one of the segment producers on the film, asked his bride-to-be if she would let the production prank their wedding on the condition that none of their friends and family know what was going on. She only had two stipulations: that the ceremony itself would not be affected, and that her dress would not be harmed.
A scene was shot where Bad Grandpa and his grandson visit the grave of deceased Jackass member Ryan Dunn but ultimately it was decided that the scene injected too much of a somber tone. Instead, the film ends with a dedication to Dunn in the closing credits.
Greg Harris spent a couple of hours in the biker bar prior to filming his scene where he takes delivery of his son. He used that time to essentially wind up the bikers and make them openly hostile towards him.