I was taught how to rap by a particularly cruel friend. From the very first, after she'd clipped into the rope, she'd look into my eyes and say meaningfully "See you in hell, bitch."
Then she'd drop over the edge and leave my gumby self quivering and alone on the belay ledge.
Now that I'm wizened and old, I still repeat that mantra to myself and my partners- it always seems to focus the mind and inspires everyone to check the system.