@Razmysl,
To walk across something, anything, can be done without making a straight line. It can be done in a zigzag manner, moving left to right, left to right or at one angle all the way. Quite simply, whatever means (way) a person chooses to go across a road, body of water, field, mountain, room, etc. If a person chooses to move across something in ever growing circular movements, they will eventually be able to get across,