step 1: 'don't order french fries you know you'll just get a stomach ache later if you eat greasy food this late'
step 2: order french fries anyway
step 3: get a stomach ache
step 4: lament your error, knowing all the while you will just make it again next time

at least it's not as bad as the time I had beer and onion rings after a very anxious day and gave myself intestinal bleeding