I’ve only ever heard r’s being rolled in comedy shows… or in bad Yakuza movies 
lol, I wish there was a video of this,
One time I was walking and a bunch of old ladies got in my way so I said ばあさん and my friend freaked out as if I said the worst thing ever. That’s the only relavant story I got.
nitpicky? hell no lol i didn’t know they were called syllabaries so i used alphabets. So thank you cerhy much!