I see, but I wonder what a kind of personal experience was it - IMO, discharging "instantly" isn't possible at all. Otherwise, You would see battery glowing blue and smoking like hell, cause 5Wh (standard battery capacity) or even 1Wh released in timeframe of second or two would be power equivalent of 18KWh (for 5Wh battery) and 3,6KW (for 1Wh charger battery), respectively. I suppose battery would melt, and water around it boiled, due to such energy instant release. Especially, having in mind water resistance.

(equivalent experiment would be to connect unprotected LiPo cell + to wall socket ground - battery would expand and explode quite quickly, but still, it would be unable to discharge in second or two. Probably, it would explode before discharging. DON'T try this at home...)

/Estel