While they're searching for this boy, you must be especially careful otherwise it will be your head on the block.

他们追查这孩子期间你得格外小心，不然身首分家的就是你了。

Find it, or else I'm putting your head on the block.

马丁：找到它，否则我就把你的脑袋放在地上。

I’m not prepared to put my head on the block for him.

【block】我可不愿意为了他把自己给搭进去。

In this case, Martin says if Diane can't find the paddle, he's going to put her head on the block.

在这种情况下， 马丁说如果黛安找不到桨，他会把她的头放在木块上。