In celebration of what would have been Grand Master Helio Gracie's 100th year, Ronaldo Aoqui (Gracie Humaita-Rio Grande do Norte) has posted a video of 100 techniques (see below). To add to the celebration, I have included some other videos. The first three include some self-defense instructional by Helio. The other two include some self-defense instructional by Helio's oldest sons (Rorion and Relson, respectively). Whatever one thinks about the ongoing debate about the relationship between self-defense and "sport" jiu jitsu, these videos are worth watching and the techniques shown are worth learning!