You wanna fuck with this?

Walking up 6th avenue around 20th street a man about my height squares me off bumping into me. My friend tells me to watch out; I think she means the guy about to walk into me. He's mumbling something about wanting to fuck with him...as in fight not sex. I side step around him and we cross the street. She immediately asks if I'm okay. What's wrong? He had a knife! Didn't you see it? I turn around and sure enough stranger is brandishing a knife and looking back at me. He keeps walking though, as do we. Mental note: don't tell mum. And, oh yeah, Happy Easter.