[Arctic Fox]

All of the gardeners in this area operate their strimmers in the same way: revving the engine every second like frustrated bikers.

I doubt that any of them went to strimmer school, so I assume that they just learnt to do this from listening to other operators.

Is this really the most efficient way to strim? It makes a very annoying noise and is probably not too good for the engine or fuel economy (thus producing more pollution). Would a constant engine speed - such as they use when blowing leaves - not be better?