Sforno on Exodus 34:8/ספורנו על שמות ל״ד:ח׳

1וימהר משה, by acting with speed, zest, the person prostrating himself lends additional meaning to his humility before G’d. Our sages in Berachot 14 describe Rav Sheshet’s manner of praying by saying: “that when he bent his knee he did so as does someone who uses a stick to beat something with.”