1 – When using crutches things that are not normally obstacles become so. For example, you need a far wider path through hallways, door ways, and rooms with coffee tables and couches, than is generally normal.
2 – Items on the floor that one can normally step around when not using crutches become deadly. A bike glove that has fallen onto a hardwood floor acts much like a banana peel under the foot of a crutch.
3 – Your speed is greatly reduced. You must learn to deal with this.
4 – Stairs are a bitch. Small ledges onto the sidewalk are a bitch. Stepping into a car is a bitch. Getting on the bus is a bitch. Basically, leaving your seat to go anywhere is a bitch.
5 – You can no longer carry anything. This includes hot beverages, laundry, dinner, and cats. Attempting to carry a cat will lead to excruciating pain followed by curling up on the floor whimpering. Ow.
6 – People let you on and off elevators first, but may or may not be kind enough to open a door for you.
7 – Biking is right out.