This is exactly what I would do if I saw a T- Rex. Well either this or run away.
This is the dinosaur I had to draw to balance out my last illustration (the girly princess one). I'm not sure I've ever drawn a dinosaur before but I enjoyed doing it. I even went for an open mouth on the little girl too - something I don't normally do. Trying to challenge myself a bit more and there isn't a monkey in sight!