Being relatively thin and active makes most elapid a bit more of an escape risk than viperids for instance, but any decently constructed hot room should easily contain a snake that size (a medium sized Ramphotyphlops would have trouble getting out of mine).

The only real danger should be if it hitched a ride out in a piece of equipment or a container.

They don't mention if it was alone in it's container. If not, I would consider having any cagemates x-rayed...
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What goes up must come down...unless it exceeds escape velocity.