Usiku mmoja Watu wanne walitaka kuvuka toka upande mmpoja wa mto kuelekea ng'ambo ya pili wakiwa na taa moja.... wanatakiwa wavuke mto at a time,kwa watu wawili either one or two people, must have the flashlight to see.Taa inatakiwa ukishavuka irudi ili kusaiadia wengine kuvuka,hutakiwi kuirusha...watu wote wanavuka kwa speed tofauti tofauti n aifahamike kuwa wawili hao lazima watembee pamoja at a rate of the slower person's pace.....mtu wa kwanza anatumia dakika 1 kuvuka mtu wa pili anatumia dakika 2 kuvuka wa tatu dakika 5 kuvuka wa nne anatumia dakika 10 kuvuka....
chakachua akili yako wavuke hao jamaa kwa dakika zisizozidi 17