There are 2 BMJack LGA secrets, part1 and part2. BMJacks are bots hidden around LGA, each accompanied by a RED BUNNY. Each of the 2 parts, when completed, will earn you a free shirt. Be sure to hit each area marked in GREEN for each of the 2 BMJack collections is broken down into certain areas that you must go to.
BMJack LGA Secret P1 "The Peace Shirt
Teleport to the Docks and head to the right corner. Jump onto the roof.
Face the wall, look up and jump. Click the arrow to climb up. Head to the next wall,look up and click the arrow to climb again.
Go to the corner of the next roof. Walk to the edge and face the water. Look up and jump, then click the arrow to climb. Once up, click ENTER to hop up a little.
Walk to the right and stop when you see the arrow. Click to climb.
Walk inside for a secret spot. This next part can be hard. You have to get to the ledge on the other side of the alcove. You can stand on the air a little bit here, just be careful not to go too far out. Run and jump to the left.
From here you will see the BMJ. Jump onto the RED BUNNY and type " /code don ".
This will teleport you to DonnieDarko. Walk up to him and you will get the Peace Shirt.
BMJack LGA Secret P2 "The OMG Shirt"
Go inside VHD (Go/Shops) and go to the back door.
To the left and then to the right. Left again and straight ahead. Hop onto the ledge and walk past the water to the building. There you will find a BMJ and a RED BUNNY. Jump onto the RED BUNNY and type " /code nara minkey ". You will be teleported to another place. Walk up the wall and head straight back. To your right you will see an arrow. Click it to climb up. Again, walk up the wall. Walk straight ahead (jump over the gap). When you reach the end you will get the OMGshirt.