碰 (pèng): เพื่อสัมผัส

I accidentally bumped into the cup on the table, and water spilled all over the floor.

In the crowded subway, he ran into an old classmate, and they had a great chat.

We planned to go hiking this weekend, but we ran into rain, so we had to postpone it to another day.

Don't touch that switch, or the machine will suddenly stop.

These two issues seem unrelated, but after careful analysis, you'll find they actually intersect.