I had that happen when I took my grandaughter out to dinner. She had been asking to go to Olive Garden. I figured I could have the Soup and salad combo....
The salad got stuck and out it came. Like you I had plenty of napkins and no one even knew what had happened. I did excuse myself to the rest room for a refreshing splash of cool Water, but when I got back to the table all was normal. I ate a small amount of the soup, no more salad and no breadsticks. Even the larger pieces of ingredients were left in the soup bowl.
The best part was that I was fully satisfied, as was my grandaughter who ate some kind of shrimp and Pasta dish woth lots of salad and breadsticks. She is 5'1 and weighs 100 pounds soaking wet so she can afford it!