I helped a couple of day workers a few years ago who needed a jump at the local recycling center. They had apparently dropped off some waste materials but couldn't get their beater sedan started. So they rolled it out of the way, opened the hood, held some jumper cables, and stood there looking needy as car after car just drove past them. I dropped off my recycling, then to their surprise I drove right up to them and popped my hood. The language barrier didn't really get in the way since it was obvious what they needed and it didn't hide the fact that they were obviously grateful. I was happy to do it. Good karma points.