Predator and bird of prey
Transform and roll out
And of course this theme shows up in the Viking. In the air, a potent air superiority fighter, with huge range and good speed. On the ground, a... ground unit, that can... walk around, shoot things occasionally, and blow up spectacularly. Okay, so the theme is not shown very well here. I understand that Blizzard wanted to give Terrans some much-needed anti-air, but make it not too good against ground (a role the Banshee fills very well). I just think they made it a little TOO not-good on the ground. As cool as a transforming mecha spaceship robot is, the motto of any Viking pilot should be, "If you need to land this bird, you've already lost." Sad, but true!