Despatch riders on Western Front.
Pan along group of men - (Belgian soldiers?) - standing by their motorcycles. Flash title frame about 'Intrepid automobilist' ..... Shot of a car & driver entirely covered with mud.
Driver wears a close-fitting hat & goggles. CU wheel in mud. This man has made a brave dash carrying messages; keeping lines of communications open etc. Looks like he could have just been through some really bad weather - a giant mud puddle.