Will I go to hell for this?

Today I say a person who was retarded (I hate to use that word, but he was). This guy was walking down the street making loud noises that sounded like "ARF! ARF! NESH NESH NESH!" and I that got me giggling. Any way, this retarded guy then started to run but tripped over and slammed his face on the concrete floor. Everyone looked round to see him bleeding from his mouth and crying, still going "ARF! ARF!" and I felt bad for the guy but I could help but burst out laughing. I know it is wrong but I couldn't help it, I was in tears of laughter. People helped him up and gave me bad looks, one guy said something like "Shut up you loser" but I couldn't help it. I know I sound like a jerk but it was possibly the funniest thing I have ever seen. I giggled all the way home, but I felt really bad. Will I go to hell for this?