Sheldon claims that he has never touched Steward. In fact, in S10 E6, The Fetal Kick Catalyst, when it's just Sheldon and Stewart left drinking mimosas, Sheldon grabs Stewart with both hands and tells him why he doesn't use any swear words (despite using them during most of the first season of the show).
Christmas tree farms don't let people use an ax to cut down the tree, but a saw is provided. Axes resulted in too many accidents.
As Penny & Leonard are carrying the Christmas tree upstairs, they are shown on the 2nd floor twice. At 12:55 in they are in their way up the stairs from the 2nd floor landing then Penny asks Leonard if he needs a break, apartment 2B can be seen on the left. There is also a bicycle leaned up against the elevator door. At 13:09 in Leonard is lying on the floor with the tree on top of him. They are again on the 2nd floor, apartment 2B & the bicycle are seen again.
Most likely, that's because Leonard lost his grip on the tree, fell down the stairs with the tree falling too and landing on top of him.
Most likely, that's because Leonard lost his grip on the tree, fell down the stairs with the tree falling too and landing on top of him.
Leonard and Penny claim that they chopped down the Christmas tree using an ax, but when the tree slides off the roof to the front of the car it is clear that it had been sawed through rather than chopped.
In the opening, Leonard reminds Penny that Sheldon doesn't like seeing any Christmas decoration after the 1st of January. Which seems odd given Sheldon's East Texas Christian upbringing which observes Christmastide from December 25th - January 6th.