Immortal Tabata can warm up all up in this chilly & rainy Sydney weather (workout can be downloaded from CrossTimer workout library with a code TABA).
You can mix the exercises around (i.e. to do pull up first, squats last) or even find a substitute for any of them. The key is to go as hard as you can for 20seconds (x 8 for each exercise). It probably sounds too easy but wait until you try. You will realise very soon that this workout is vey deceiving.