Pulling a Tom Schmitz per definition is referring to a mental state, in which input is blocked from the brain.
That is, the person that is "Pulling a Tom Schmitz" does not react, nor reflect on the information that is being transmitted to him/her from the outside environment.
While some people claim it has to do with an abundance of grease within the persons ear canal, the non-reflective look in the individuals eyes hints on a higher level of soul selling that is being conducted in the very moment a "Tom Schmitz is pulled".
The mental state can last up to 18 minutes without interruption.
Careful: Waking a Tom Schmitz pulling person up can result in the confusion of this person, a sub-state that can take days to recover from. Tom Schmitz pulling persons need to revive from the 5th Dimension in a self-aware manner.
Common Slang in the Central European Area.
Person A: "Hey what do you want to have for lunch?"
*No reaction*
Person A: "Man, can you answer?...HEY!!"
*No reaction*
Person pulling a Tom Schmitz: "O_0"
--> To pull a Tom Schmitz