Commentary for Bava Kamma 52:10
ואמר רבה זרק כלי מראש הגג והיו תחתיו כרים או כסתות בא אחר וסלקן או קדם וסלקן פטור מאי טעמא בעידנא דשדייה פסוקי מפסקי גיריה
And if a man lie not in wait,<span class="x" onmousemove="('comment',' Ex. XXI, 13. ');"><sup>28</sup></span> excludes a case where there was intention to throw a stone to a distance of four cubits, but which fell at a distance of eight. Regarding [the release of] a slave the difference of opinion between R. Simeon b. Gamaliel and the Rabbis<span class="x" onmousemove="('comment',' V. supra p. 137. ');"><sup>29</sup></span> still applies. Rabbah again said: In the case of one throwing a utensil<span class="x" onmousemove="('comment',' Belonging to another. According to the interpretation of Rashi a.l. the utensil was thrown by its owner; cf. however, Rashi, supra 17b. ');"><sup>30</sup></span>