I can assure you that the glass would break and you'd probably get in a lot of trouble for tossing an object off of an office building. Actually, the root beer would remain motionless relative to the glass itself. Given the absence of outside influences such as air currents, wind movement, flagpoles, and flying birds, the root beer wouldn't even slosh out of the glass. First off, make sure you take off your shoes before walking across Mom's clean floor. Instead, ask Dad what to do.
Quicksand is nothing more than sand particles supported by water rather than other sand particles.
Kind of like sand mud. Its density is greater than the density of most other things, hence, you'd float in it. If you struggle around you'll only sink further. Keeping that in mind, here's what you do if you fall in quicksand - be still. You'll stop sinking at which point you can use slow swimming movements to get yourself on 'top' of the quicksand, then simply roll until you reach solid ground.