Indeed. But your question was more about Line Infantry men flying when hit by horses. This is a bit exagerate in NTW but it was extremely violent. If you read the memories of Milhaud (famous cuirassier commander) or Ségur (hussar and HQ aide) , you will figure that the combined force * of the cavalry charge crushed the first ranks. Cuirassier did not use their sabre but were charging very close to litteraly run over the line infantry. At Eylau for example, Larrey told us about the human slop resulting of the passage of nearly 10 000 cavalry men on 5 russian régiments.
* As you did maybe for your driving license, you can calculate the Newton force resulting of a 500 kg horse at 30 km/h. This cinetic energy will even increase with the combined charge of a regiment.