spine-splintering whiplash of listening to a radio show from 1956 and hearing the hardboiled detective exclaim "now you're cooking!"
Yes, the phrase they’re using was originally “now you’re cooking with gas”, and was a promotional slogan for the introduction of gas stoves, which go back to the 19th century. (The “now you’re thinking with portals” phrase was a play on this.)
"now you're thinking with portals" comes from WHAT


























