The escape clause[1]
ויוצא משה את-העם לקראת האלקים מן-המחנה ויתיצבו בתחתית ההר
Moshe took the people out from the camp to greet Hashem, and they stood at the foot of the mountain[2]
The holiday of Shavuos celebrates the giving of the Torah to the Jewish people[3]. It’s when the Ten Commandments were stated. Before the great revelation of the Divine, the Torah says that the Jews stood בתחתית ההר, “at the foot” of the mountain. However, literally read, the verse says that they stood “under” the mountain. Chazal learn from here[4] that this teaches us that Hashem picked up the mountain, and held it over their heads. He said to them: “If you accept the Torah, good. But if not, then this[5] will be your burial place”. Thankfully, the Jews accepted the Torah. In fact, they later accepted it anew in the days of Achashverosh, out of love. However, this shows us that initially it was only through coercion. The gemarra concludes that this created a מודעא רבה לאורייתא, meaning they had an escape clause. If they ever failed to keep the Torah, they could always claim that they never accepted it willingly. They were never really obligated to keep it, since their acceptance was under duress. Only once they accepted it anew did they lose this claim.