channeling/casting working while stunned

[Sneaky]

You move a foot behind Tamsin's leg and shove with enough force to send her sprawling!
Tamsin falls to the ground!
Tamsin is stunned!
(energy -1)
Large drops of water circle around Tamsin's hands.
end roundtime
A blast of scouring water expands outward from Tamsin!
You are struck by the expanding ring of scouring water!
You fall to the ground!
You are stunned for 5 seconds!
You can't do that while lying down.
You can't do that while stunned!
Tamsin no longer appears stunned.
You've managed to blink the water clear of your eyes.
I don't think this is suppose to be possible. Let me know if I'm wrong though.