Pants down 5th innings:
As the first pitch of the 5th inning is thrown you (and other participants) drop your pants to reveal an under layer or further pants (be it sweat pants, shorts, board shorts, a second pair of jeans, jorts with Bugs Bunny on them, etc. The funnier the better). In keeping with the "Family Game" mantra the said "under layer" CANNOT under any circumstance be your underwear/drawers/unmentionables. At the third out of the bottom 5th, you then replace your original outer pant.
NOTE: If the average person (consider the average person to have slightly extravagant/tacky/comical taste on occasion) wouldn't wear them as outer pants under normal conditions, don't wear them as "pants down 5th" attire. If you wear a banana hammock you will be kicked out of the stadium.
If you look back to when the "pants down fifth" was implemented, you can note a statistically significant number of runs scored for Aggies during the fifth innings. On that note... you fair weather baseball fans of the '07 season are welcome.