Given a sentence, generate a most likely context or previous statement. The previous statement should be relevant to the given statement.

Someone turns and looks at someone.
A teenage boy throws another rock as a pickup truck pulls up behind him.

He then adds soda to the cup which makes the cup full to the top and starts to stir it up with a metal tool.
A guy shows you how to make a drink, the guy pours ice in a tall glass, adds a half cup of a certain type of liquor and pour it in the cup with the ice.

He leaps out of the tree.

Someone punches someone off the roof.