From 28 Days Later...
[Mark tells Jim and Selena the story about his family from when the infection began
I remember my dad had all this cash, even though cash was completely useless. About 20,000 other people had the same idea. The crowd was surging. I lost my grip on my sister's hand. I remember the ground was soft. I looked down, and I was standing on all these people, like a carpet. People who had fallen, and somewhere in the crowd, there were infected. It spread fast. No one could run, all you could do was climb...