Because Rudolph intentionally grounded the team...
One, but you can be sure a whole Reddit community will appear to expand the joke, make it funnier and eventually run it into the ground.
Better question would be: Why were they in the tree in the first place?
They held the telephone wires off the ground.
King's Landing
Grounds for termination.
The Ground
They throw silverware on the ground!
Littering.
Ground and federal expresso
They are always full of seed.
The ground!
Because he was grounded.
Because it's grounded.
In the ground.
Noone cares.
Because it was s knotty pine!
Well, well, well
Because they were grounded.... Or black I am not sure.
Grounding
1 Terrahertz
You would too if you had to fly Alitalia.
Because he was grounded!
Because he reached terminal velocity.
They're grounded.
The feel the leash go slack! (heard this one while listening to some Irish tunes)
His grades were below sea level
Under the ground.
You're grounded.
He felt the slack in his dog's leash.
It's your fault!
The beans are always under-ground.
Throw it on the ground and tamp on it.
Well, well, well My grandpa's favorite joke. Took me five years to get it.
An eggplant.
Me: "The abs hiding under this protective layer of you're grounded."
Because you can't bury them in trees!
None
The rest of your life.
Hippocampus!
Your career
Grounds for termination!
Said Jane. "I thought elephants stayed on the ground!"
Me: How do you know what weed smells like! Busted, mister! You're grounded for a week. Dad: Okaayy
Barium.
Because it was two-tired
Spits*
Stay grounded.
The leash goes slack.
When they're astronauty.
Because it was found on the ground.
Because you can't bury them in the sky!
DUCK!" How do you get a kid up and running "GOOSE!"
Because they were under-ground.
It didn't have any pickups
Because they'll worship the ground you walk on.
Pin its other hand to the ground.
She was trying to find the lowest prices
Because a girl on the ground said "I have a boyfriend" later that day the nuke fell into depression
Because that would be "grounds" for termination!
Sinkhole de Mayo
They know people will blow them.
A dead centipede.
A fruit by the foot
Because it was grounded.
When it falls to the ground, it knocks the 'ell out of it.
That's grounds for divorce!
The electrician knows where the ground is.
There close to the ground.
The ground.
How high you tie it on a tree.
Lets get right into the noose.
They might be cheetahs!
Because all the one that can run, jump, or swim are already in the US.
They're both full of blue devs.
Heist cream Got to give credit to my friend, who sadly dosent have reddit.
Alan RIPman
Because he is a NAPPY BOY!!!
Most married couples tried to stay together FOR the kids. Not divorce because of them.
Lettuce alone, without dressing. I remembered this today from a joke book I had when I was a kid. Wasn't sure if it should be here or /r/dadjokes
All of them
You can't hear an apple
Look for the one with shaved legs....
Half a cheetah.
To be on the safe side!