Yup...
Not long ago, about a year ago i think, i went to a friend house in london for a week or so, and we went to a nearby mcdonald in downtown. After ordering the stuff i wanted, I had orange pop, chickenburger and fries (I remember cuz that the the only thing i order from mcdonald) anyway as i carried the tray, i was holding the tray with one hand, as i have done it before, but somehow the tray tipped and the weight of the drink overweighted the rest and all the sudden the tray flipped all over, the pop spilled all over as well as the other was ok and stayed on the tray.. but the embrassing part was that there was a couple sitting at a table right where the pop spilled all over. Damn that was embrassing. I had to apologize for the accident, and i spoiled their fries.
Ever since that incident, i always carried the tray with two hands...