When the Spike is planted - it is BLUE.

When the Spike is being defused - it is RED.

When the Spike is defused to the half-way point - there is a Spike indicator that is at the half-way point.

When the Spike is half-way defused, the defusal sound is a lighter/higher pitch tone.

The total defuse time is 7 seconds.

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So post plant, if you stare at the Spike and it is BLUE, there is no such thing as - I THOUGHT THEY WERE STICKING IT. I hope this is helpful!