Too many times to count.! Never quite as dramatic anymore, but It is uncanny how I might be talking to someone who has ,say.... an unexplained skin rash. The next day I'll wake up itching. They'll tell me about their sciatica and the next day.. a little tickle of it.
Sarno called that the Nocebo (I will harm) the opposite of a Placebo (I will help)...the etymology isn't exact but it's close enough.
Those people who "KNOW" STUFF like what your client said are DOOMED. Jesus said "It is as you say". There is veracity in that at so many levels
"Man, I never get the good jobs" It is as you say
"My back goes out twice a year" It is as you say
"Bad stuff always happens to me" It is as you say
But , I actually say (and mean) stuff like
"I am the luckiest son of a bitch ever".
"Things always work out for the best"
"My body is strong and heals fast"
Now, if I were around dudes like that all the time? THat might wear on me a bit. God bless you!