This paper builds on previous work reported [1] at COMPLEX96 and developed [2] at the Circuits Conference ECCTD97 in Budapest, on simple electronic iterating circuits containing traps and snags. Some definitions are given below. The present paper also draws in some behaviour of artificial network traffic models reported [3] at COMPLEX94 and in a paper [4] in the International Journal of Electronics where the mathematics is presented in full. Some of the previous papers are available in HTML format at the web site listed above. Crisis-induced intermittency has been identified in the electronic circuits described [1] at COMPLEX96, and a paper [5] describing the behaviour observed has been presented at the conference on non-linear theory and its applications NOLTA98 in Switzerland in September 1998. Descriptive extracts, figures, and pictures from the NOLTA98 paper are included in the electronic example below.