I'm ringing to say you're invited to dinner, and my son will pick you up in his car after work. He said he would phone you, but I thought I would phone, because waiting for him to phone is like waiting for the Messiah to come.
Thanks to Shoshanna for this phrase.
Of course, it is the metaphor which is mixed, not the mother.
This will only be a mixed meatphor if we add another metaphor to the mix.
