What does the "T" symbol signify.

[Hairy Scot]

We see a lot of the PI players in Super Rugby make what looks like a "T" symbol (similar to that used by the refs) when they score a try.
Anyone know what that's all about?

[TRF_Olyy]

Try and guess

[Hairy Scot]

Try and guess

Here am I thinking there was some deeper significance!