[Moonman62]

FLy sideways?

...

I think it’s called a skid, and while the plane is still flying mostly forward, it’s also flying a little bit sideways too. I’m reminded of that crash in New York where the copilot over controlled with the rudder and the vertical stab snapped off.

[jonascord]

'Skidding', as I learned it, is an unbalanced turn, where you haven't applied the proper amount of rudder to match the angle of bank. (There is the Turn and Bank instrument, where you step on the ball to balance the turn.)

You might be thinking of 'crabbing' which is forcing the aircraft to yaw, by the application of rudder. This is handy if you want to scrub off airspeed during landing. or the crosswind is shoving you sideways during landing. That's what the pilot is doing on the GIF.

Years back, there were two crashes of airliners where a hydraulic valve malfunctioned, slamming the rudder hard over. This sent the aircraft into an uncontrollable roll, and the pilot fought it all the way to the ground. He didn't make it.

But, sideways? Nope.