I'd take a bull over a first calf heifer any day. But a lot of the times, in my experience, when the whole herd comes they are just curious. If you stand your ground they'll stop. Run and they get all excited. I hate to turn my back to cattle. I can usually read its next move well before it does it, so I'd prefer to watch it.
With that being said, I have been run out by new moms a couple times

I've had a couple brushes with bulls, and they have always been holstein bulls that caused the trouble! The cows on this place I trapped were sweet, but he had two bulls that were a hand full. I had trapped on him for many years, and he warned me about those two, and I always kept an eye on them, and luckly I didn't have as serious a run in as others on here telling about, but at different times both chased me in my yota, and I just sped away from them.

Was calling in Wy one time, two mule deer does came in and were flailing at me with their front hooves. I thought I was gonna have to take one or both of them out for a little bit! I ended up standing up, and that seemed to bring them to their senses!

Pigs----no one mentioned pigs!!!!! Boy have I been chased by those suckers when I was a kid!!! I will no knowing it enter a pig enclosure again!!!!!!!

After reading some of these posts, it seems like Holstein bulls are the pit bulls of cattle.

When I was a teenager, we were seining redtail chubs on Sauk river. A Holstein bull chased us out into the river to the point where we had to swim because of the depth. When he couldn't touch bottom, he stopped, turned around and went back to shore. We swam to the other side and sat on the bank until the herd left before we went back to get our net and minnow boat.

While you are at it might as well mention roosters also. My brother dang near got his eyes pecked out when he was about two. My other brothers and I took care of that with a couple pitch forks and the cows cast iron tub watering trough. lol

Anyone ever encounter a PO'd bull on the trapline?

I don't know what made me think of this today, but many years ago when I was in my early twenties I recall walking through, what I thought was a heifer and dry cow pasture to pull two fox sets I had on a high grassy hill just out of the pasture fence on the far side.
I remember seeing the 20 or so cattle way down on the opposite end of the pasture a good 300 yds away. With traps retrieved and on my way back through the pasture I had just turned the corner where the pasture lane led back to the barn. Not really paying attention to the cattle and ambling down the lane I here a Fa-lump Fa-lump Fa-lump from behind me... Out of nowhere comes this big, mostly white holstien bull, head down, at full steam straight at me.
I had about 3 strides to get up enough speed to high jump the taunt 5 strand fence. I barely made it over but my trap bag got hung up in the fence. The bull slams into fence as I am rolling on the ground to get away as I hear the wire screech and a cedar fence post crack. luckily the fence holds while I get to my feet and start running away. I hear the bull let out one of those low gutteral bellars as I look back to see the wires stretched tightly across his brisket

I remember back at the truck, looking back at the bull still pacing back and forth in that section of lane .
I figured that moving on down my line and retrieving my trap bag and traps still hanging in the fence at a later time would be best...