I was drinking a protein shake every evening as my dinner right after my workout and then next thing I knew the following week I had put on 2 lbs like that! (chefambershea.com)
You try to write a book on marriage and sex with your wife and next thing you know there are a lot of ants crashing your picnic. (religion.blogs.cnn.com)
You're walking along, thinking about something, and next thing you know someone has ridden their bike over your foot. (effectivecoverage.com)