This is an often MISUNDERSTOOD technique – in the hands of noobies it turns into an attempt to pull an opponent over the chest. It can be done by powerful people, but it’s not a sound jiu-jitsu technique (meaning it can’t be done by any but the very strong!). Here we have the vital aspect of the proper move. As Jen comes to smoosh Ray-ray, Ray-ray stuffs Jen’s leading hand (the right in this case) under forcing Jen to lead with her shoulder instead. This gives Ray-ray an opportunity to continue the momentum and bridge Jen over. TIMING IS EVERYTHING!  Practice until it is smooth!