i was a bit shocked that someone was so nice this morning after being so rotten yesterday . oh yeah ? it 's always a bit suspicious when someone just changes their attitude like that . yes especially after they did a lot to you and have n't even said sorry . i ca n't deal with people with such huge mood swings . they did n't even apologize ? wow , that 's rude . well , hopefully their friendlier mood will last a while . i 'm off that train so they are n't coming back on board until they get better .
The person experienced someone's rude behavior without an apology, despite their previous friendly interactions.