<human>: So, just about am hour ago (yes, I'm still freaking out) I was talking with a coworker/friend about another coworker that we mutually dislike for being a snide asshole. The snide coworker and I were talking about a Facebook post that I had made regarding my 3-year-old cousin who was recently diagnosed with cancer.

He had asked me about it and I said "Yes, the doctors found a cancerous cell." 

The snide coworker snidely remarked "Oh yeah? Was it cancerous? HYUCK HYUCK HYUCK!" Thinking he was being funny and edgy or some shit. It pissed me off, but I didn't say anything.

An hour later, my friend coworker shows up because he was just passing through and we talked. I told him about the snide coworker's shitty remark and as I was imitating snide coworker, a lawyer (who works in the building) walked by as I was imitating "Oh yeah, was it cancerous? HYUCK HYUCK HYUCK!" The lawyer gave me the death stare and walked out.

At that moment, it clicked. That lawyer is currently undergoing chemotherapy and I didn't recognize him because he now wears a hat because he is self-conscious about his hair-loss. I feel horrible, didn't get a chance to apologize and explain myself and now I am fully expecting some harsh repercussions from my boss tomorrow. My boss is a very frantic man with no capacity to understand the context.

Can you summarize the given text in a few sentences?
<bot>: Imitated an asshole coworker that was passive-aggressively making fun of my cousin, who has cancer. Man with cancer walks by and hears the worst of it and assumes I was being the dick.