One more trivial example is that of synesthesia. It generally means that one sensation (like reading text) is directly and involuntary felt through another sensory channel (like seeing colours).
In one common form of synesthesia, known as grapheme â†’ color synesthesia or color-graphemic synesthesia, letters or numbers are perceived as inherently colored, while in ordinal linguistic personification, numbers, days of the week and months of the year evoke personalities. In spatial-sequence, or number form synesthesia, numbers, months of the year, and/or days of the week elicit precise locations in space (for example, 1980 may be "farther away" than 1990), or may have a (three-dimensional) view of a year as a map (clockwise or counterclockwise). Yet another recently identified type, visual motion â†’ sound synesthesia, involves hearing sounds in response to visual motion and flicker. Over 60 types of synesthesia have been reported, but only a fraction have been evaluated by scientific research. Even within one type, synesthetic perceptions vary in intensity and people vary in awareness of their synesthetic perceptions.
I often try to imagine things like that. Once, because I can relate to some of these synesthesic perceptions, but also because I think one can train to think (and feel) outside the box.