You've probably heard of the amazing survival skills of Bear Grylls.
His adventures in the wild have been well documented in the series 'Man Vs Wild with Bear Grylls'.
Over seven seasons of the programme, Bear Grylls has done things that most people will have trouble even imagining.
Wittyfeed has compiled some of the most insane acts that the title character has committed throughout the whole series.
Take a look at them in the gallery below and try not to lose your appetite.