The grave

I was taking a stroll in the park with my best friends, Zaynab and Sadia. We were talking and talking until I fell. I received a massive graze on my elbow and my friends helped me up. When I got up, I realized something. I touched something strange. What was that I could feel? I looked down and I saw my grandpa's grave. " What was it?" my friends asked. "Nothing, just a random person's grave." I replied. So we left that place immediately. Then, we were talking across the road while walking. After, we said goodbye to each other.