Chaverim (and Hatzalah) ARE malachim, IMO. We once broke down in an area of town that is not known for being frum-Jew friendly, on a Sunday around 5 PM and could not reach AAA. I called Chaverim, but they were on several other calls and could not reach us. Our battery had died for reasons unknown and all we needed was a boost, but we were reluctant to try flagging anyone down to ask for help.
To complicate matters, we also both have a sugar problem, had not eaten in a few hours and had used up the emergency snack we left in the car(lesson to be learned, folks), and had no idea how long we would be stuck where we were.
All of a sudden, a Hatzalah ambulance pulled up. It seems that CHAVERIM had notified Hatzalah of our situation and told them, if they were not needed on another call, could they stop by and give us a boost (and see if we needed any medical help, which fortunately we did not, as yet). They had jumper cables, boosted us, and we were on our way in a few minutes. We were only 15 minutes from home, during this entire event (no one was home to come help us, or we would have called them). Like I said – MALACHIM. And that’s why I regularly donate to both organizations.