Radio Active Jelly...A few students on foundation day painted a van with Lucas Heights Nuclear Commission on the side of it and whilst driving through George St, Sydney, Australia, rolled out a 40 gallon drum of green jelly onto the road.
They stopped, got out in suits and Geiger counters set on max sensitivity so as to continuously crackle.
The resulting mayhem of pedestrians and drivers was something to behold. Soon the police cordoned off the area.
The driver of the van said he was off to get some gear and disappeared. The others soon after also disappeared, leaving the police with a 40 gallon drum with nuclear signs on it and green stuff falling out of it and a very worried public.