Res Ipsa Loquitor in the Field of Justice:

You know how in cricket, the umpire gives a decision based on what he saw, but if a spectator also saw a similar incident and can confirm, his statement is admissible in case of dispute, like a third umpire. Same thing with Res Ipsa Loquitor. It's like when you buy chaat street food and the vendor says, "Maine to dekha hai, woh khaana toot gaya." (I saw it, the food broke) You believe him, right? Now, in court, if a machine is involved and there's no one around to say what happened, the court assumes the accident wouldn't have happened without someone being careless. It's like the machine is speaking for itself, "Main toot gaya hai, koi garibi hui hai.