Triple Throw 30.

We can quickly calculate the odds of getting nine heads in a row. It is much more difficult than you say.

1 head in a row 50%
2 heads in a row 25%
3 heads in a row 12.5%
4 heads in a row 6.25%
5 heads in a row 3.125%
6 heads in a row 1.563%
7 heads in a row 0.781%
8 heads in a row 0.39%
9 heads in a row 0.195%

so about 2/10ths of 1% chance to fail TT 9 times in a row at 50% pass rate.

That's 1 out of 512 people. Not that bad, as I said.