TOP OF ALIEN EGG AND JUMPING FACEHUUGER IN IMAX TRAILER?

HEY GUYS 55/56 SECS IN TO THE IMAX TRAILER! THERE LOOKS TO BE A THE TOP AN ALIEN EGG IN A WHAT APPEARS TO BE A CONTAINMENT CHAMBER- I tried toupload the screen capture but im badly rubbish and couldn't fathom it- can anyone put it up for this discussion- looks like an egg to me-ALSO CAN ANY GRAB A SLOW DOWN OF THE SAME TRAILER IN HIGH RES 51/52 SECS IN SOMETHING SMALL JUMPS UP AT ONE OF THE CREW MEMBERS THAT IS SHOT IN MID AIR TO THE LEFT- CAN ANYONE GRAB A GOOD IMAGE OF WHAT IT IS? what do you think-