Ballpoints always jam on me, requiring about a kilonewton of force and about five minutes of blank scribbling to get it going again. Then, often, they leave big blotches of their sticky ink on the page when turning a corner.
The Safari does jam on occasion, but usually, a single well-placed drop of water is enough to get it going again. That depends on the ink you use though. If you use water and inkjet printer ink, it never jams, though it is a little bloody. 30 water : 1 platinum carbon black makes a lovely grey, but it jams so bad that I need to add a bit of inkjet printer ink to keep it running. Yeah, you’re definitely not supposed to water down that ink so much lol.