Paul G. Kry is an associate professor in the School of Computer Science at McGill University, Montreal, Canada. His main research interests are deformation, multibody systems, contact, and physically based control of simulated characters. He received his Ph.D. in computer science from the University of British Columbia in 2005, and was a postdoctoral fellow at INRIA Rhone-alpes, France prior to joining McGill in 2008. He has been regularly teaching physics based animation at McGill for over 10 years, and has given short courses on the related topics at summer schools.