Is it just me because some dude built like Doraemon told me “Aymganasakyodik”.

I was just chilling outside the smoking area near at Eki, some dude just keep telling me "Aymganasakyodik" with typical Japanese accent. I just looked at him then distanced myself then I reached in my leather jacket that Im wearing and acted like I was hiding some weapon while Im looking at every direction as if Im looking at everyone so that they cant see what Im gonna do. Guess what he did, he just stood there staring at me while Im looking at him at my peripheral vision.