ORD-SFO 757 seat belt sign on, no chop condition. I see people getting up to go to bathrooms. When I get up, an FA comes in the aisle to collect trash, she's in my way so I stand in my seat to let her pass, she stops next to me and starts yelling for me to sit down and buckle up. I said that I have to go to the bathroom, she yells that she has to tell me that seat belt sign is on. I pointed at other people standing by the bathroom door, she yells again that she has to tell me to sit down and buckle up. I sit down and buckle up wait for another 15 min to the seat belt sign to turn off and then make a dash towards the bathroom.

I know she's required to do whatever she did, but cmon the attitude these days are uncalled for.