A little background: I am 41, 5'10" and 176 lbs. I have been cycling steadily for 3 years and currently ride a minimum of 150 miles per week. I hate jogging or running, but was talked into a short lunchtime run by a co-worker.
So....
I went for a 2 mile run today (which I admittedly hated for the first mile, but warmed up to the concept during the second), and was wearing my HRM. The highest I was able to go on the bike was 181, but imagine my surprise when after the run my HRM reported 198 Max! About 1/4 mile into it, I checked my HRM to make sure it was working and saw 89, checked again a minute or so later and it was steady between 160-165. I never got uncomfortable and actually felt like I could go another mile or two. We completed this run in 15:37.

The question is...does 198 sound reasonable for a guy with the history above? Did I risk blowing a gasket at that heart rate? Is that kind of a jump in heart rate (89-160 in a minute) normal when running?
Are there a lot of people who hated running then kinda grew into liking it?

Thanks
Bob