Automagically scroll down an image when you scroll to its half.

gistfile1.txt

($ document).ready ->
    (($ document) .find '.showoff') .live 'mouseover', () ->
        h = (($ this).css 'height').replace 'px', ''
        ($ document) .data 'next_position', ($ this).position().top + h + 20
        ($ document) .data 'launch_position', ($ this).position().top + (h / 2)
    ($ document).live 'scroll', (event) ->
        if ((Number) ($ document).scrollTop() > ((Number) (($ document) .data 'launch_position'))
            window.scrollTo(0, ($ document).data 'next_position')