story: Timothy went for a ride on his electric skateboard. He went so fast, he went faster than the cars on the road. People honked at him. He thought it was because he looked so fly. But actually a squirrel was riding on the board behind him.
 selected sentence: But actually a squirrel was riding on the board behind him.
A squirrel is on Timothy's electric skateboard >Causes> Timothy feel(s) surprised