Shocker (noun)

An event, situation or thing that causes great surprise or disbelief.

Origin:

Unknown.

Examples:

1. The election results were a real shocker for many people.
2. The stock market's sudden drop was a shocker to investors.
3. The sudden twist in the plot was a real shocker to the audience.
4. The hurricane's destruction was a shocker to the coastal town.
5. The announcement of her resignation was a shocker to the team.