Sing the songs in different accents........that makes them a little more tolerable......try not to laugh.
Take a few bandaids(don't tell your wife) and leave to the bathroom..............but stay gone a long long time............come back with your finger badaged up .....explaining that FirstAid was full.
Take binoculars and look for anyone........anything interesting. Look at all the flowers and plants around the stage.........
Tell your wife you need a closer look at the carpet and baptismal pool as you may want to purchase them........and take a trip around the place so you can get away.
take your IPOD and tell everyone you have to listen on the raido to the assembly, but jam out to some good Rock-n-Roll.
Spill something all over your jacket right before the end of lunch and spend the first afternoon talk in the halls drying out!!!!
I always leave early cuz I don't feel well, or I am sleepy and the drive home is so long.
Say you are going to the bathroom and stay gone long time and tell your wife someone needed your help moving some chairs or something...........
Heck use your imagination!!!!!!!!!!!!!!!!!!!!
but whatever you do............don't do the rat thing Elsewhere suggested..........!!!!!!
purps
Have a blast!!!!