Oral commitment is a horrible and blatant misnomer in the English language. Oral, having to do with the throat and mouth, has come to mean Verbal (or spoken), through constant improper usage. The straw that breaks the camels back is the legal community adopting the term oral to mean spoken.
Answer to your question, I think Lukas either mouthed Oregon or clicked Oregon with his teeth in Morse Code.
Yeah not seeing any difference here. I'm pretty sure everything you say has to do with your throat and mouth.