I'm translating a post about psychology and having trouble with this sentence:
"I know when I'm sitting across from someone who's smiling brightly at me while simultaneously describing a significant loss or disappointment that I may have tripped over someone else who's hiding."
The context is someone trying to hide their negative emotions. But I can't say for sure what exactly the author is meaning. I understand what is meant by someone who's smiling brightly but it's the latter part of the sentence which confuses me, i.e. while simultaneously describing a significant loss or disappointment that I may have tripped over someone else who's hiding.
Does the author mean while he/she is chatting with someone who's smiling happily, someone out there is having trouble and stuck in sadness but trying to hide these emotions?
Or he/she means, he/she talks about an unhappy one while chatting with the bright one?
Could you guys please clear up this sentence for me? Thanks so much.