reword media README

media/README.md

@@ -5,15 +5,17 @@ This is your home for Pseudbot's media files.
 Place thematically-related media files together in subdirectories of this one.
 
 ## Using media
-Mention Pseudbot in a tweet followed by the 🖼 emoji and a category.  If you
-wanted to tweet a randomly-selected image from the `smart` directory at the
-head of a copypasta response chain (note that your instance of Pseudbot will
-have a different handle) you could tweet at the bot:
+Mention Pseudbot in a tweet followed by the 🖼 emoji and a category to post a
+tweet with a related reaction image attached.
+
+If you wanted to tweet a randomly-selected image from the `smart` directory at
+the head of a copypasta response chain (note that your Pseudbot instance may
+have a different handle) you could tweet:
 ```
 @pseudbot 🖼 smart
 ```
 
-If you want to only tweet just an image with no attached copypasta chain, add a
+If you want to only tweet an image with no attached copypasta chain, add a
 second 🖼 emoji at the end of your tweet like so:
 ```
 @pseudbot 🖼 smart 🖼