If there's anything that we learned from this video, it's that Brian O'Driscoll is a tough taskmaster.
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O'Driscoll, Jason Robinson and George Gregan along with Ben Ryan, who helped coach Fiji to Olympic sevens gold last year, recently put some fans through what was termed the 'ultimate endurance test'. The aim was to instil a sense of how 'sickening' sevens rugby can be.
Having Jason Robinson slap you with a tackle bag as you attempt to run around a ball while Brian O'Driscoll berates you certainly isn't easy.
