Why did Severus Snape cross the road wearing an invisibility cloak?
So no one would know what side he was on.
Invisibility Cloak Jokes
Harry Potter has an invisibility cloak, I have family.
I was given an invisibility cloak by my grandfather, but it was stolen in 2013. After investigating this issue, I have come to the conclusion it was Robert Lewandisney.
That's why he was invisible in every big game since 2013. SHAME ON YOU LEWANDISNEY!