Good Riddles

Question: sedentary stop + sudden start = ?

Question: what makes a snap sound and capture the happy moments of you ?

Question: When you say my name, I am no longer there. What am I?

Question: 1 11 21 1211 111221 312211 13112221 1113213211 what comes next?

Question: I work in a battle of wits. The battle is again with only two while an army each has. Each must take a turn in stratagem but to win the leader must die. What am I?