Bistable stimuli provoke spontaneous alternation of two stimulus interpretations whereas the stimulus information remains constant. These stimuli provide either insufficient information or ambiguous information. The last case is typical for dynamic bistable images. However, the sequential frames in these stimuli are temporally correlated. In the present study, we aim to characterize the perception of a bistable stimulus that lacks temporal correlation between successive frames. We used a sequence of spiral Glass patterns that induce a rotary motion in an ambiguous direction. The study results show that this stimulus has the typical characteristics observed for bistable stimuli. However, its perceptual characteristics differ from those of a rotating spiral Glass pattern with simulated direction flips. The specific feature of the bistable stimuli used in the study may provide new opportunities for studying the interaction of the brain areas involved in shape and motion perception and their participation in perceptual awareness.