I had a Google Hangouts chat on my computer going with Jen.  We were talking about returning a purchase to Best Buy.

I had a text chat on my phone going with Larry.  We were talking about Bellana’s birthday.

I answered Larry’s text chat in Jen’s Hangouts chat even though the two mediums have zero in common.  I typed a text on my keyboard instead of my iPhone…

and I didn’t notice until half an hour after I clicked send.