I have a vague feeling( sorry vague is all I can be ) that there is at least two threads showing colour neg films that were exposed by at least 3 stops under. I can't say what those films were unfortunately nor whether they were subsequently pushed but I have a feeling they were not. One was a shot of a still life indoors and the other was of a male outside wearing jeans by a hedge. I think the latter was to demonstrate that development at less than 100 degrees F was possible and produced acceptable negs

Hopefully I have said enough to spark others' memories who will direct you to the threads in question