falling in isn't realy a problem, there's also a screen in the heatport, but I do usually keep the dog at a slight upweard angle while hitting, especially the first hits.
I do often have pieces of weed stuck in the heatport, happens most with a bit bigger pieces and if you just take 1-2 hits then remove the stem(I either tap on the UD, tap the UD with heatport down on my hand, or use my stirring tool to remove it since sometimes tapping wnt help). kief also tends to stick to the heatport, but more to the rim so you can quickly wipe it off with a finger, or with the stem. (I can really recommend a stem filled with mostly kief btw)
I will spend some qalitytime vwith my dog today, we didn't get to do much yesterday, I was sick. came up really suddden in the morning(usually I get warningsigns at least the previous night), didn't really have an appetite but ate a grilled cheese sandwich anyway, and guess that was a bit too much, 15 minutes later my breakfast ended up in a bucket. then I thought vaping might help, since it usually works for sickness-symptoms(but I haven't thrown up in years, except from booze), but right after taking a bonghit I had to use the bucket again so I didn't dare to vape the rest of yesterday.
but now after a long night rest I feel better, if I still feel good after breakfast it's time to catch up