1)
Why did Hashem tell Moshe to 'hurry' and why did He add the word "mi'Zeh ('from here')?
1.
Oznayim la'Torah: He told him to hurry to save Yisrael from further Avodah Zarah, Giluy Arayos and Shefichus Damim.
2.
Oznayim la'Torah (citing Sh'mos Rabah): And He added "mi'Zeh" because the angels wanted to kill him - and Hashem had to open a door underneath the Kisei ha'Kavod to enable him to escape. 1
1
See Oznayim la'Torah, who elaborates.
