What would you do?

If you came home at 6:00 in the morning and your kids were playing in the street ALONE (1 and 2 years old) Well that is what happened to me a couple days ago.... I had a babysitter watching them from 5:20 am to a little after 6:00am. The babysitter was sleeping when I went inside and my oldest son (2 and a half) had gone upstairs and gotten my youngest out of his bed (i know because the light was on and the door was open which my one year old can not do. Also the babygates were all torn down (all 3 of them) which only my oldest can do went down to the garage opened the door (which is really loud) and went outside. They also freak out when they wake up so i know they were crying. How the babysitter did not wake up to any of that is beyond me!
Well needless to say i was TERRIFIED! they could have been hit by a car, abducted, CPS could have been called.
I went and talked to my neighbors and asked if they saw them outside and one said he left for work at 6am and they were not out there at that time so it had to of only been a few minutes that they were out there but that is still scary that she didnt hear it and things can happen in the blink of an eye!