One truly unusual and entertaining exhibit at the Tokyo Dino Expo 2011 was the mount of a Tyrannosaurs in a sitting position. And here it is:
Not only did this look great, and was something nice and novel, but for me it was nice to be able to access some bones rather more effectively than normal. My access to tyrannosaurs is generally limited to mounted casts, and while there’s the inevitable problems of things like the metatarsals overlying each other, and the ribs obscuring the dorsals, it’s made much worse when the skull and most of the vertebrae are several feet above you. Bringing the whole animal down to ground level made it much more accessible, and also helped demonstrate how certain things change with changing postures – just look at the flexion of the knee joint for example.