If you arent used to eating a lot of really heavy full and you wind up doing something like that because you accidently let yourself get too hungry, the uber full feeling is so bad you do want to die, or make yourself puke or something. I tottaly understand. The large pizzas where I live are about "21 inches- and eating half is way way more than just an individual sized pizza.
I can feel your pain lilmisslacey!
If that happens to me, which it does about twice a year, usually after an indian food feast, walking is the best option. Slow, steady walking. It's hard to get going, but once you do, it's totally worth it. The fresh air helps alot too!
Lokah Samastah Sukhino Bhavanto
'May everyone everywhere be happy
May the whole world be joyous'