Nic pic, but…  
Earth ponies don’t fly

Pinkie must have damaged Twi’s hot air balloon when Twilight needed it for an emergency.
 
They had to improvise.

Seeing how Twi is using bellows i doubt that it’s helium.
 
It’s… MAGIC.

Everybody needs to get a blimp  
‘Cause blimps are pretty pimp  
You can fill it up with air  
But that wont get you anywhere
 
Advertise upon the side  
Take your girlfriend for a ride  
Just fill up the ballon with the very best gas in toon  
HELIUM
 
You need helium to fill that bitch up  
Its the second symbol on the periodic table  
Oxygen and nitrogen are way behind it  
As chemicals go they’re both pretty stupid
 
HELIUM  
HELIUM  
HELIUM  
Don’t breathe it in though!
 
ALL TOGETHER NOW!

Pinkie, whatever you do, don’t fart.

and that’s how teamwork goes