ADV [ADVERB after verb]头朝前地 If you move head-first in a particular direction, your head is the part of your body that is furthest forward as you are moving. 头朝前地
He had apparently fallen head-first down the stairwell.
他显然是从楼梯井口一头栽了下来。
My mate dived headfirst through a window and I ran down the hallway.