The corporate office can be filled with potential landmines. For example: You meet up with your new coworker, who is in a wheelchair, in the company hallway. Up until this point, you've only had a chance for some limited small talk, but as far as you can tell, you've hit it off well. As you proceed along the hall with some office chit-chat, you notice the corridor begins to slope upward. Noticing your colleague is now having slight difficulty moving the wheelchair up the incline, you think nothing of it as you take hold of the chair from behind and gently guide it toward the end of the hallway. Good deed, right? Wrong. Instead of gratitude, your new colleague looks at you with an unexpected mixture of anger and resentment. As you come to the end of the hall, he rolls away without as much as a word. The incident leaves you befuddled and a little angry. Where was the disconnect? "Some people are going to want you to assist them if they're in a wheelchair, and others aren't," says Michael Takemura, director of the Hewlett-Packard Accessibility Program Office.