Headfirst adv. : Alt. of Headforemost

Example:
How much impact is taken on your legs when you go Headfirst bungee jumping?

Taxonomy
Head First, learner, Brain Powers, Labs, First books, Brain Power, downloads, elements, O'Reilly Media, the Head, narrative line, PDFs, boards, Michael Milton, Hero's Journey, video supplement, teaching elements, the brain.

Defination from the web:
Head First series from O'Reilly Media. ... Introducing the Back of the Napkin -- A brief, hands-on introduction to Dan Roam's excellent book, another book high on the Head First recommended reading list. ...