From 0 to 60....

Why is it that every minor conflict has to go from 0 to 60 in a matter of seconds? 

Tonight, I came home exhausted after shopping and doing all our errands to find my ADHD partner on the couch watching movies right where I left him.  This is after I spent the hours from 7AM-2PM tip toeing around our apartment because he was asleep on the couch (I couldn't even make myself something to eat for fear of the wrath I would surely incur for waking him).  All I wanted to do was sit on the couch for a second and maybe watch a little TV.  It was a no-go considering my partner refused to unstretch his legs so I could sit at the end of the couch.  This turned into an immediate full-scale yelling match (with him doing most of the screaming) culminating in him calling his dad to come "remove me from the premises" (his parents are our landlords).  I think his dad has learned to pretty much ignore him at this point, but still.  This is beyond ridiculous.