It's also not possible to just start bubbling out around the building just as its collapsing, and plus, there is absolutly no footage of a plane hitting WTC 7
Controlled demolition or office fires, take you're pick
I would go for office fires.
Because honestly, who in their right mind (following of truther theory mind you), would blow up 2 significantly important buildings, and fly a plane into one that no one cares about, just for the fact to blame Nonamekhandistad.