Here is a great optical illusion photo taken of a Lufthansa 747-400 and a
United 757-200 that were on simultaneous approaches to runways 28L and 28R
at San Francisco (SFO). The separation requirement for flying parallel and
Simultaneous approaches is 225 meters (738 feet). These two aircraft are
at a safe distance for the approaches they are each flying. Due to the 747
being three times larger than the 757, and being slightly behind will give
us this incredible optical illusion. Someone not familiar with aviation may
very well see this and make an assumption that these two aircraft are only
inches apart. Reminder:  Judgment comes from knowledge and experience.
How someone perceives events can be very different from the facts.