The odds of hitting 2 straights in a row at 5 card stud is about
5%.
Since the deck is reshuffled between deals, the two hands are
sequentially unrelated, so the odds of two deals with two straights
is simply th odds of one times the odds of another.
In order to draw a straight, you need to draw an ace, 2, 3, 4,
5, or a 10, jack, queen, king, ace, assuming that ace can be high
or low.
The odds of drawing one of these cards is 10 in 13, but you have
5 chances to do so, so the odds of drawing the first card is 50 in
13.
The odds of drawing the second card is 39 in 51, but you have 4
chances to do so, so the odds of drawing the second card is 156 in
51.
Similarly, the odds of drawing the third, fourth, and fifith
card is 38 in 50, 37 in 49, and 36 in 48.
Multiply these odds and you get 19,740,240 in 77,968,800.
Reducing that to lowest terms, you get 246,753 in 1,112,110, which
is the odds of drawing a straight. The numeric value of the odds is
0.22187823146990855221156180593646, or about 22%
Square that and you get 60,887,043,009 in 1,236,788,652,100.
That is aready in lowest terms, so that is the odds of drawing two
sequential straights. The numeric value of the odds is
0.049229949600214317813758989938262, or about 5%.