See also Old-Timey.
Often used during a test. Or in a airplane.
Psst. Got something funnier? Add your own funny thing to do.
If you're the person across the table, you don't really know when to stop saying "Bless you." After awhile, you wish they'd sort of just knock it off.
See, for example, the James Bond film Thunderball.
Dude, do you think she'll get it? See also 80's.