Setting the hook

I'd like to congratulate my friend, Mark for taking his first intro flight yesterday. I still remember my first intro flight (also the first flight I've ever had in a small airplane), it was the first step in a long journey (which I'm still on), and it's a step not everyone makes. Mark wrote the following in an email to me soon after he solo'd:

"Ground school cast out the line."
"When you took me up I bit the hook....Matt just set it!"

Clear Skies Mark! Once the hook's set, you're not getting free!