No this isn’t a lesson in method acting.
Obviously there are many situations where using a tripod is simply impractical but…
It is a good idea to always think of stabilizing the camera at least in some way if possible.
The greater the zoom you are dealing with, the greater the compensation you are making for low light the greater the possibility that camera shake will enter in.
If you can’t use a tripod or monopod then try to make yourself into one.
Lean against a wall or even lock your elbows against the side of your body.