Technically the shofar blowing thing should not be enough sensory evidence to convince you of the prior improbability of this being the God—probability of alien teenagers, etcetera—but since you weren’t expecting that to happen and other people were, good rationalist procedure would be to listen very carefully what they had to say about how your priors might’ve been mistaken. It could still be alien teenagers but you really ought to give somebody a chance to explain to you about how it’s not. On the other hand, we can’t execute this sort of super-update until we actually see the evidence, so meanwhile the prior probability remains astronomically low.
Technically the shofar blowing thing should not be enough sensory evidence to convince you of the prior improbability of this being the God—probability of alien teenagers, etcetera—but since you weren’t expecting that to happen and other people were, good rationalist procedure would be to listen very carefully what they had to say about how your priors might’ve been mistaken. It could still be alien teenagers but you really ought to give somebody a chance to explain to you about how it’s not. On the other hand, we can’t execute this sort of super-update until we actually see the evidence, so meanwhile the prior probability remains astronomically low.