Trigger UI is confusing

criticality: 
Moderate
Drupal7: 
Open
Task: 
Trigger module
This happened to: 
Participant 2

There are lots of issues on the UI of Trigger, most participants who got there either never finished it or knew it completely. Only the first/second participant struggled with it enough, to get some data out of it.

Users expected to select hook instead of select action.