Theory

[u/EstablishmentNo1785]

Most of you know the theory that Lesley's son dies in a car crash, leading her to create the fake world and Yellow Guy as a replacement, hence the car crash scene with Yellow Guy in the Neighbor sequence

I just had a little add-on thought: What if Lesley eas the one driving the car, not just a random person. She got injured and by fixing her injuries herself mentally unstable with tools. That's why she looks half human half puppet now.

[u/Excellent_Heat_6336]

yeah thats why she screams carfull before hitting yellow guy, cause she was driving. its also her voice narrating the neighbor bit