Well, you were either abducted by aliens, or you ate the sugar cube the hippies gave you.
English
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Abducted by aliens? Why?
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or you ate the sugar cube given to you by the hippies.
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But I met no hippies and ate no sugar cube...
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That you remember. Look at it this way: you are missing the time you walked home after the flash, you could also be missing the time with the hippies.