Giant big tentacle-thing
From Tardis Wiki, the free Doctor Who reference
By 2005, Clive Finch, who collected evidence of alien invasions, had a photograph of what Rose Tyler called a "giant big tentacle-thing" wrapped around Westminster Abbey. This made Rose sceptical, as she could not recall the event, though Clive was aware of theories which explained how the memory of such incidents was lost to the general public. (PROSE: Rose)
