1)
What grabs what?
1.
Rashi: The pit grabs him via his heel.
2)
What are "Tzamim"?
1.
Ibn Ezra citing the Kohen: They are virgins.
2.
Ibn Ezra: Others say, these are rocks in Arabic. This is the opposite of "Im Avnei ha'Sadeh Brisecha."
3.
Devar Eliyahu: They are those who thirst for his property. They could not overcome him before, only now that his Mazal fell.
4.
Malbim: They are knots of the trap. They tie tightly on his foot, and he cannot remove it.
