Another barrier broken

Although this one is a bit of a silly one. I've noticed lately that my weight has been going down - its around 83 kilos right now - but after a particularly sweaty session, I was seeing 80.5 kilos and I thought it must be possible to break the 80 kilo barrier. Today sweated loads doing my series on the spinning bike and, just for good measure, spent about 5 minutes in the sauna afterwards. Here is the result

That's me + iPhone (without iPhone I weighed 78.8 kilos!)

To put this in perspective: I haven't been this side of 80 kilos in 20 years! Although I should say, that when I did last weigh less than 80 kilos it was without having to lose several kilos in sweat beforehand.