My Bad Mom Moment (one of many...)

Today Aidan and I went to lunch with a friend and when we were leaving Aidan ran out of the restaurant and straight to our car. He was still very much in my line of vision and so it wasn't too scary. (Mistake #1...he ran away from me and I didn't grab him quick enough.) He then tried to open one of the doors on the car and when that wouldn't work, he went to the other side. (Mistake #2...still didn't have a hold of the little independent fellow.) So, after a quick good-bye to my friend I started on my way to get him. Well, here comes a man and a lady and she is holding Aidan's hand...Aidan is so thrilled to see me that he starts saying "Mommy, Mommy..." (Mistake #3....holding hands with stranger....) When I get up close which took about 2.5 seconds, the lady says "Is this your mom?" In a disgusted tone of voice. I say "Yes. Thank you for bringing him back to me." And then I picked him up and started hauling him back to the car. She says "Well, I just didn't want to have him get run over by a car since he was running all over the parking lot by himself." (Okay, point taken.) I said "Thanks again". Then her husband says "We could have just run over him for you if you wanted us too." WHAT?!?! I just stared at him, turned away and got Aidan in the car super quick like and took off. Who says that?? Am I REALLY the one with the problem here? Anyway, I get it. I am a mom who has some bad moments. He is at a hard, independent age and I made a mistake. But really? Do you tell someone you are going to run over their child? Now I feel like a complete failure and that I don't deserve children. But, it also makes me mad to think that someone would be so rude to actually tell someone else that they would run over their child. So, today I am loser mom....Hopefully my kids live another day so I can be a better mom!