Word. Grappling will fuck your shit up. I was in Jujitsu when I was in college back in 2002 but later realized that ground fighting wasn't my style. I've since sparred friends who took the shit and if you're brought to the ground, you're in a world of hurt.
Also Eric, throat punch isn't necessarily the easiest thing to accomplish. There is a limited amount of exposure you can use to target and due to not only a person's reflex but the situation itself counting the increased amount of movement, it makes it more difficult to get someone perfectly to where they'd go down. Also, if you hit them hard enough to break their windpipe, you're looking at criminal charges depending on your location and whether or not the situation would be proven as self-defense.
You're almost better off targeting someone's temple to get them disoriented. A quick enough jab to cause a knockout is your best bet.
But remember, sweep the leg, Johnny.