You will certainly answer positive to the question .Do you know well your collection?. Still look closely at it. Are there unusual species, sometimes called freaks, among your plants? These can include plants having an unusual exterior (photo 'Hands up' - Cylindropuntia subulata), form (Big-nosed shorty - Astrophytum myriostigma var. tulense), blooming or shoots (Individualist - Opuntia sp.) and so on. If you find any in your collection send photos to this rubric.