1)
Whom did the people want to stone?
1.
Rashi: Yehoshua and Calev.
2.
Sotah, 35a: They actually threw stones upwards towards the Shechinah. 1
3.
Oznayim la'Torah (citing MIdrashim): They wanted to stone Moshe and Aharon - with reference to Pasuk 2. 2
2)
In what form did the Glory of Hashem appear to the people?