The SS packed as many people as they could into the train cars, so they were very crowded. There was not enough room to sit, so people were forced to stand very close to one another. There were no bathrooms, so people had no choice but to soil themselves. With so many people in the small place, it would have been noisy. There was only a small window--if there was one at all--so it also got very stuffy and hot in there. It was so hot and airless that often the elderly or babies or people who were already ill would die; their bodies would be left where they were until the train stopped. When the trains stopped, the SS would force the people to throw out the dead bodies. They would spray the survivors with water hoses to clean out the waste. That was also the only water the people were allowed to have on the journey.
It would have been a nightmare!!