Ha ha. No. Passing Clouds were cigarettes during the 60's, that were a squashed circle shape. They came in a pink box and were very expensive at, 7 shillings and sixpence. If I remember correctly.
I vape the pen shaped ones ( http://www.906vapor.com/uploads/3/2/2/3/32237215/6693120.jpg?438.3333332538605 )and find it perfectly fine for me. Mr Boo vapes one like this (http://www.cloudcig.co.uk/wp-content/uploads/2015/09/Joyetech-EVIC-VT-Kit.jpg ) He prefers his to mine as he produces a helluva lot of 'cloud' and the hit is stronger.