Improve language

docs/events/events.md

@@ -55,11 +55,12 @@ services:
 
 ## Error events
 
-The `UPLOAD_ERROR` event happens before an exception is thrown further up in the hierarchy. An error
-when removing a file will emit the event but unless you handle it somehow the error will be swallowed and
- the operation will preceede as if the file has been removed.
+The `UPLOAD_ERROR` event happens when writing a file fails, and before an exception is thrown.
 
-You can use the event to trow an error when the error occurs:
+If an error occurs while removing a file, then the `REMOVE_ERROR` event gets fired. Failures in removing files do not 
+trigger any exceptions unless you choose to throw an error in the event handler for the `REMOVE_ERROR` event.
+
+You can use the event to throw an error when the error occurs:
 
 ```php
 <?php