This improv game is in the following improv game categories:
All players, except one, the victim, form a long line. The first player in the line throws any word to the victim, who responds as fast as he/she can with the first word that comes to mind. The next player in the line then throws another word, usually unrelated to the previous word, and again the victim needs to respond as fast as possible. Repeat till everyone has thrown a word.
You can even have multiple victims walking the line at the same time. Make sure there is enough `space` between the victims, otherwise, with the first hesitation, victims will start bumping into one another.