KLK plunged 28% or RM6.50 to RM17.00???

In a split second at a trade recorded about 3pm, KLK plunged 28% or RM6.50 to RM17.00.
In only about 1 minute, the price recovered to above RM22 again.

Comment:

This is likely to be a key in error.
You can see this very rarely... so what should you do?
Key in BUY call everyday at about 20% lower than market price... hopefully one of the day you can get this kind of trade.