Well I see that Hollywood is still making ridiculous movies and damn that guy doesn't pull up like climb to 3000 feet and not stay close the the ground lol..........
No, no, it makes perfect sense. John Cusack made the pilot take off before he reached a safe takeoff speed, so he only got off the ground because he was in ground effect. It's difficult to increase your airspeed and climb out at the same time if you're too slow, which is why it takes him so long to gain altitude. Also, it looks like the ground is rising up (prior to sinking into the sea) which would make things still harder.
Who knew a Rolland Emmerich film could stand such scrutiny?
Also, I'm not sure what the plane is - maybe a Twin Comanche?