2nd day down for the $25,000!
Turns out it's not a Stanley knife being extended and retracted. Good guess though

Make sure you're thinking about how the item is being used. It's no good just saying it's a piece a concrete. What's it doing?
(HINT: It's probably not a piece of concrete)

Spam the replay button on this podcast and be ready to call 13 10 60 weekdays from 6am with Xavier, Juelz and Pete for you chance to win

Thanks to Homebuyers Centre