Once arrived at LHR with a bag of very heavy books - over 15kg The lady at SQ weighed my checked bag at 22kg and said with a smile "we'll let that go. Anything else?" "Just this small bag" says I lifting the books nonchalantly with one arm to shoulder height - "fine"
So I smiled, lowered the bag slowly and then wandered away behind the nearest pillar where I could wheeze, burst into sweat and go grey..............