Reacting without stimulus does. A stopwatch maintains an internal state, the neural networks used by LLM’s don’t.

Someone who starts lucid dreaming can have zero awareness of their body and still do stuff like make up a story which they then recall after waking up.

PS: Balance over all but very brief periods depends on noticing your body weight pressing on something this is one of the reasons people can get disoriented under water. Temperature can be lost track of for similar reasons, rapid changes are noticeable but slowly moving in the neural region ~30-36 °C and all people can detect is a lack of extreme heat or cold not some objective temperature.