Chess openings tend to drift in and out of fashion apparently depending on spurious factors such as whether or not they have a strong player using them. A good example is the Raptor Variation of the Trompowsky which goes 1.d4 Nf6 2.Bg5 Ne4 3.h4!?, a one time favourite of UK GM Julian Hodgson which all but disappeared when he stopped using it.
Interestingly it now seems to be making something of a comeback, mainly thanks to the efforts of Richard Rapport. There are a few others chipping in too such as the inventive Australian GM Max Illingworth: