Jet and Dirk are dressed like cowboys.
Two subjects (Jet and Dirk) are both doing one thing (are dressed). CSN.
Dirk jumped and shot the ball into the hoop.
One subject (Dirk) did 2 things (jumped, shot). CV.
Kidd and Dirk pointed in surprise at the foul.
Two subjects (Kidd and Dirk) did one thing (pointed). CSN
Emmit Smith ran like lightning and scored a touchdown!
One subject (Emmit) did 2 things (ran and scored). CV
T.O. and Romo looked up at the giant screen in the stadium.
Two subjects (T.O. and Romo) did 1 thing (looked). CSN
Jason Witten ran quickly and the Vikings tackled him.
Two subjects (Witten and Vikings) did 2 different things (ran, tackled). This is a compound sentence - 2 small sentences joined together by a FANBOY.
Josh Hamilton dove for the ball and made the catch.
One subject (Josh) did 2 things (dove and made). CV.
Hamilton and Murphy gave each other a high-five in celebration.
Two subjects (Hamilton, Murphy) did one thing (gave). CSN
Josh waits on deck while Omar runs the bases.
Two different subjects (Josh, Omar) are doing 2 different things (waits, runs). These are 2 small sentences joined by a subordinate conjunction (while). Complex sentence.