I met him as a student, during covid, when we were struggling with our passive dynamic walker project. Although we were spread out in different countries, he was able to help us work through the process, encouraging, patient, and insightful. Then with the bike and prosthetic leg project, he was there to support us again, and also celebrate our achievements. I appreciate his way of teaching and how he was enthusiastic about our work as that made a difference to us. My condolences to the family.