Reference for Yoma 168:10

ואי אשמועינן בור משום דקא מיבעית אבל ננעלה דלת אפשר דיתיב בהאי גיסא ומשביש ליה באמגוזי צריכא

If he saw a child fall into a pit, he breaks loose one segment [of the entrenchment] and pulls it up - the faster the better; and he need not obtain permission of the Beth din, even though he is thereby making a step [stairs]. If he saw a door closing upon an infant,<span class="x" onmousemove="('comment',' The infant may be frightened, or within the room, endangered.');">⁹</span> he may break it, so as to get the child out - the faster the better; and he need not obtain permission from the Beth din, though he thereby consciously makes chips of wood.

Jastrow