LMAO Everything not to do with concrete.

[SeisMec]

Came on while I and my buddy were watching YouTube. POed both of us until we realized it was an April Fools joke.

https://www.youtube.com/watch?v=40uCoIgxPC0

 

[dogdog]

Amazing tricks... I'll try that on the next pour.

 

[jonesg]

I mix ping pong balls in the mortar, saves weight and cement.
You can also insert an air hose and aerate the cement for weight saving applications such as installing cement flooring in your kitchen or going over a boat deck.

 

[sweetk30]

thats the guy in the video that did this poor guys slab .

https://www.garagejournal.com/forum/showthread.php?t=458093&highlight=concrete