@The Hedgehog
Put quite simply.... precious few of us (if any) are liable to know the answer at all, much the same as is the case for the myriad questions you have previously asked about the minutae of animal movements, and any of us that *do* happen to know are unlikely to be at liberty to discuss the matter. Moreover, it's best that you avoid speculating about the nature/temperament/psychology of the animals concerned, and whether it is likely to be part of a pattern or a one-off event, as this is another thing you have a tendency towards doing
So to summarise, when you are curious about a matter relating to animal movements at a zoo, always ask yourself
"is this something that Zoochatters are likely to be able/allowed to post?" and consider the matter for a while before deciding to post, and when you are tempted to speculate about the motives/psychology of an animal involved in an incident - or the likelihood of the incident happening again - try to sit back, think
"is this an inappropriate line of enquiry?" and act accordingly.
Your difficulties
are noted, and understood, but I reckon this is a point you *are* capable of learning and understanding - in my experience it's always better to give people with difficulties such as ours something to aim towards and practice, rather than expecting nothing of them