Bizarre incident

Yes, this is my third post today but I had to write about something strange that happened today. There is this big white house that I pass every day when I take Kacey to and from school. I think it must be used as some sort of home for elderly people because I often see several of them sitting on the porch together when the weather is nice. There is a big van parked in the driveway every day- you know, the kind that can seat like 10 or more people. Anyway, today as I was driving past the house I noticed a couple of men out on the lawn. One was probably in his 50's, and the other man looked very elderly. I saw the younger man push the older man down onto the ground, then the old man put up his arms as if to defend himself. I did a double take and turned my car around. When I passed by again the younger man was pushing the old man into the house. I turned around again and no one was outside anymore. I didn't know what to do so I called 911. I gave the dispatcher the address and everything, and he said they would send someone out. I wasn't sure if I should call 911, but I was so shocked that I thought I had to do something. I don't know what happened. I gave the dispatcher my information but no one has called me. I hope the old man is okay.