I used to make up different, seditious words to the hymns and wait to see how long it took for the folks next to me to notice and slide down the pew...
Sitting in church in high school next to one of your fellow miscreants... everytime the congregation was supposed to say "Amen", he would say "Gay men"
Sometimes I still can't get that hilarity out of my head.
Or when it it was point out to me that the Pray Together book could be read to say "pray to get her"
Oh god I am so immature