Don't know about the looking back-I am not foolhardy enough to try it. Riding no hands though- that depends on weight didtribution and bike. Never have done it on the MTB but my co-rider on the Tandem does it all the time. He gets me worried at times. But road bikes- sit back in the saddle, sit upright and it is easy. Keep the weight forward and I am in trouble.
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How long was I in the army? Five foot seven.
Spike Milligan