system
afraid: Once, I was walking home from work and it was late. My street was unusally quiet and there was a man walking quickly behind me. I was very scared. He ended up passing me but he whispered a nasty word as he walked past. 
human
I was walking home from work late a few weeks ago and my street was unusually quiet. 
human
What happened?
human
Well, there was a man walking really quickly behind me and there was no one around. 
human
Sounds a bit scary.  What did you do?
human
I panicked and he caught up. He walked by quickly and said a really nasty word in the creepiest way. But he kept going.  My knees were shaking. 
human
Oh my goodness I would have been terrified!
human
Yes, it was so scary. My heart pounded for at least half an hour. I was shaken. 
human
Thankfully he walked on past you but what a horrible experience all round.