I see from Consumer Reports that tipping does sometimes happen. And not just from &#x27;tripping&#x27;.<p><a href="http:&#x2F;&#x2F;www.consumerreports.org&#x2F;cro&#x2F;2012&#x2F;02&#x2F;rollover-101&#x2F;index.htm" rel="nofollow">http:&#x2F;&#x2F;www.consumerreports.org&#x2F;cro&#x2F;2012&#x2F;02&#x2F;rollover-101&#x2F;inde...</a>