Move

Google Riddles - The Sand Clocks

Riddle:

You have a 4 minute sand clock and a 7 minute sand clock, you need to measure 9 minutes while using both of them. What's your first move? (The 'Google Riddles' are interview questions those who wish to get hired were asked).
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Without Wanting

Riddle:

I cause your vehicle to move without wanting to. What am I?
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