Bash and trip:

Trip: ALWAYS does just under 2 rounds of lag. So if you get tripped in between rounds, you will get the next command in. However, if you were spamming directions when someone surprised you with a trip, your next command is going to be one of those directions, which isn't going to help you much!

Trip (as with anything that sends you to the ground) can trigger a skill called cheap shot. Orcs and some thieves have cheap shot. The echo for cheap shot is normally something about being kicked while you are down. If you get that, it adds a round of lag, so trip + cheapshot CAN permalag you.

Bash does 1 to 4 rounds of lag to the target (random), and the amount of lag it does doesn't depend on who is hitting who it with. Bash is, however, less likely to hit someone who is big relative to the basher, and more likely to hit someone who is small relative to the basher. But if there are 2 sizes or more of different, you can't be bashed. Other things affect whether bash works or not, like weight carried by the basher, a legacy etc.

Sometimes a lagging skill lasts a little longer than it "should". That's if, instead of going through in between rounds, if goes through at the start of a round. If that's the case with trip, for example, it'll lag an extra round (or at least, an extra amount of time just long enough to prevent you getting a command in 2 rounds later).